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Image Subject Name Scientific Name Description
5475603 bull thistle Cirsium vulgare Bull thistle is a widespread biennial thistle orginally from Europe and Asia, but now introduced throughout North America. 
5482965 purple loosestrife Lythrum salicaria
5488357 thistle Cirsium spp.
1556050 tall fescue Festuca arundinacea base of leaf/ leaf sheath
2149092 johnsongrass Sorghum halepense Ligule
1334111 giant reed Arundo donax Clasping leaf base.
5362842 spurred anoda Anoda cristata Spurred anoda (Anoda cristata) plant in flower.
5472405 Canary Island tamarisk Tamarix canariensis Wind or water dispersed seeds
5472404 Canary Island tamarisk Tamarix canariensis Scale-like leaves, similar to native red cedar
5472415 Canary Island tamarisk Tamarix canariensis Salt cedar flowers can range from white to pink. The buds are usually a darker pink than the opened flowers.
5472403 Canary Island tamarisk Tamarix canariensis reddish new stems are characteristic of Tamarix canariensis
5472414 Canary Island tamarisk Tamarix canariensis Tamarix flowers can range from white to pink. This picture shows the darker pink color of the unopened buds.
5472410 Canary Island tamarisk Tamarix canariensis Close up of Tamarix canariensis flowers
5457907 scarlet pimpernel Lysimachia arvensis Close-up of the hilar region. Note lack of tubercles.
5376347 orbicular whitetop Lepidium chalepense Showing funiculus remnant at base of seed in side view. FNW taxon.
5376348 orbicular whitetop Lepidium chalepense Hilar area of seed in marginal view. FNW taxon.
5376351 hoary cress Lepidium draba Hilar notch of seed. FNW taxon.
5376419 smallseed alfalfa dodder Cuscuta approximata Close-up of hilum. Similar to an FNW taxon.
5376414 Japanese dodder Cuscuta japonica Close-up of hilum. FNW taxon.
5376416 field dodder Cuscuta pentagona Close-up of hilum. Similar to an FNW taxon.
5376410 largeseed dodder Cuscuta indecora Close-up of hilum. Similar to an FNW taxon.
5376413 Japanese dodder Cuscuta japonica Close-up of hilum. FNW taxon.
5376381 Asiatic dayflower Commelina communis Close-up of the embryotega. Similar to an FNW taxon.
5376378 commelina Commelina coelestis Close-up of embryotega. Similar to an FNW taxon.
5376380 Asiatic dayflower Commelina communis Close-up of seed surface. Similar to an FNW taxon.
5376556 monochoria Monochoria vaginalis Close-up of the surface of the seeds. FNW taxon.
5376559 monochoria Monochoria vaginalis Hilar region. FNW taxon.
5376560 monochoria Monochoria vaginalis Chalazal end of seed. FNW taxon.
5376553 arrowleaved monochoria Monochoria hastata Close-up of the surface of a seed. FNW taxon.
5376554 arrowleaved monochoria Monochoria hastata Hilar region with persistent funiculus. FNW taxon.
5376555 arrowleaved monochoria Monochoria hastata Chalazal end of seed. FNW taxon.
5376535 African mile-a-minute Mikania cordata Apex of fruit inside pappus whorl. FNW taxon.
5376539 mile-a-minute Mikania micrantha Close-up of apex of fruit. FNW taxon.
5376532 red melastome Melastoma sanguineum Close-up of hilar area of seed. Similar to an FNW taxon.
5376636 bitter mesquite Prosopis articulata Lens (top) and funiculus remnant of seed. FNW taxon.
5376632 bitter mesquite Prosopis articulata Close-up of two pod sections. FNW taxon.
5376634 bitter mesquite Prosopis articulata Fruit segment. FNW taxon.
5376321 barwaq Asphodelus tenuifolius Close-up of suface of seed. Similar to an FNW taxon.
5472446 common groundsel Senecio vulgaris Close-up of fruit surface. Similar to an FNW taxon.
5472444 Madagascar ragwort Senecio madagascariensis Basal fruit attachment scar. FNW taxon.
5472441 Madagascar ragwort Senecio madagascariensis Close-up of fruit surface.
5472440 South African ragwort Senecio inaequidens Fruit apex with a prominent style remnant. FNW taxon.
5472438 South African ragwort Senecio inaequidens Close-up of fruit surface. FNW taxon.
5472454 Scotch thistle Onopordum acanthium Fruit attachment scar with elaiosome on left. Similar to an FNW taxon.
5472421 Geraldton carnation weed Euphorbia terracina Close-up of hilum. FNW taxon.
5472420 Geraldton carnation weed Euphorbia terracina Caruncle of seed. FNW taxon.
5472427 capeweed Arctotheca calendula Close-up of pappus scales. FNW taxon.
5472419 Egyptian Thorn Acacia nilotica Lens and funiculus remnant of seed. FNW taxon.
5376872 coat buttons Tridax procumbens Attachment scar at base of fruit. FNW taxon.
5376871 coat buttons Tridax procumbens Close-up of hairy fruit surface. FNW taxon.
5376855 broadleaf buttonweed Spermacoce alata Close-up of seed surface. FNW taxon.
5376834 annual sowthistle Sonchus oleraceus Detail of ridged surface including narrow longitudinal groove. Similar to an FNW taxon.
5376830 perennial sowthistle Sonchus arvensis Close-up of basal fruit attachment scar. FNW taxon.
5376829 perennial sowthistle Sonchus arvensis Detail of ridged surface of fruit. FNW taxon.
5376825 tropical soda apple Solanum viarum Hilum of seed. FNW taxon.
5376824 tropical soda apple Solanum viarum Surface of seed. FNW taxon.
5376820 turkeyberry Solanum torvum Surface reticulation of seed. FNW taxon.
5376821 turkeyberry Solanum torvum Hilum of seed. FNW taxon.
5376814 wetland nightshade Solanum tampicense Surface of seed. FNW taxon.
5376813 wetland nightshade Solanum tampicense Hilum of seed. FNW taxon.
5376812 silverleaf nightshade Solanum elaeagnifolium Surface of seed. Similar to an FNW taxon.
5376810 silverleaf nightshade Solanum elaeagnifolium Hilum of seed. Similar to an FNW taxon.
5376795 Mediterranean saltwort Salsola vermiculata Close-up of base of winged fruit. FNW taxon.
5376734 lata Prosopis torquata Lens (top) and hilum (below lens) of seed. FNW taxon.
5376728 Argentine screwbean Prosopis strombulifera Lens (yellowish mound) and hilum (above). FNW taxon.
5376724 albardon Prosopis sericantha Lens (top) and hilum (bottom) of seed. FNW taxon.
5376721 vinal Prosopis ruscifolia Lens (top) and funicular remnant (bottom). FNW taxon.
5376717 mesquite Prosopis ruizlealii Lens (top) and hilum (bottom) of seed. FNW taxon.
5376712 mesquite Prosopis rojasiana Lens (top) and funicular remnant (below) of seed. FNW taxon.
5376707 tornillo Prosopis reptans Lens (top) and hilum (bottom) of seed. FNW taxon.
5376700 palo de hierro Prosopis palmeri Lens (top) and hilum (bottom). FNW taxon.
5376697 kiawe Prosopis pallida Lens (whitish) and hilum (below lens). FNW taxon.
5376694 kiawe Prosopis pallida Close-up of surface of fruit. FNW taxon.
5376692 barbe de tigre Prosopis kuntzei Lens (top) and hilum (below) of seed. FNW taxon.
5376688 algarrobilla Prosopis humilis Lens (yellowish) and hilum (below lens). FNW taxon.
5376685 algarrobo paraguayo Prosopis hassleri Lens (top) and funicular remnant (bottom). FNW taxon.
5376681 mesquite Prosopis fiebrigii Lens (whitish) and hilum (below lens). FNW taxon.
5376676 churqui Prosopis ferox Lens (top) and hilum (bottom) of seed. FNW taxon.
5376672 Syrian mesquite Prosopis farcta Lens (yellowish) and hilum (below lens). FNW taxon.
5376665 algarrobillo Prosopis elata Lens and hilum at base of seed. FNW taxon.
5376661 algarrobo patagonica Prosopis denudans Lens (mound) and hilum (below lens). FNW taxon.
5376654 mesquite Prosopis castellanosii Lens (white) and funicular remnant (below lens). FNW taxon.
5376650 algarrobillo Prosopis campestris Lens (top) and hilum (bottom). FNW taxon.
5376645 calden Prosopis caldenia Close-up of lens (large mound) and hilum (seen below lens). FNW taxon.
5376640 calden Prosopis caldenia Close-up of part of fruit. FNW taxon.
5376637 mesquite Prosopis burkartii Close-up of lens (top) and hilum (bottom) of seed. FNW taxon.
5376631 algarobilla Prosopis argentina Close-up of lens (top) and hilum (bottom). FNW taxon.
5376626 alapataco Prosopis alpataco Close-up of lens (top) and funiculus remnant (bottom) of seed. FNW taxon.
5376595 brown-beard rice Oryza rufipogon Detail of fertile lemma surface. FNW taxon.
5376467 ducksalad Heteranthera limosa Hilar end of seed. Similar to an FNW taxon.  
5376468 ducksalad Heteranthera limosa Chalazal end of seed. Similar to an FNW taxon.
5376533 African mile-a-minute Mikania cordata Basal attachment scar on fruit. FNW taxon.
5376511 African boxthorn Lycium ferocissimum Surface reticulation of seed. FNW taxon.
5376513 African boxthorn Lycium ferocissimum Hilum of seed. FNW taxon.
5376504 limnophila Limnophila sessiliflora Hilar end of seed. FNW taxon.
5376491 swamp morningglory Ipomoea aquatica Hilum of seed. FNW taxon.
5376483 miramar weed Hygrophila polysperma Hilum of seed. FNW taxon.
5376563 blue-tulip Moraea polystachya Seed surface. Similar to an FNW taxon.
5376479 Cape-tulip Moraea schlechteri Seed surface. FNW taxon.
5376478 Cape-tulip Moraea schlechteri Seed surface. FNW taxon.
5376476 Cape-tulip Moraea knersvlaktensis Seed surface. Similar to an FNW taxon.
5376474 Cape-tulip Moraea pallida Seed surface. FNW taxon.
5376460 goatsrue Galega officinalis Hilum of seed.
5376453 Geraldton carnation weed Euphorbia terracina Chalazal end of seed. FNW taxon.
5376450 leafy spurge Euphorbia esula Close-up of caruncle. FNW taxon.
5376439 waterhyacinth Eichhornia crassipes Chalazal end of seed. Similar to an FNW taxon.
5376436 anchored waterhyacinth Eichhornia azurea Hilar end of seed. FNW taxon.
5376437 anchored waterhyacinth Eichhornia azurea Close-up of the surface of a seed. FNW taxon.
5376435 anchored waterhyacinth Eichhornia azurea Chalazal end of seed. FNW taxon.
5376430 alfombrilla Drymaria arenarioides Close-up of the surface of a seed. FNW taxon.
5376408 dodder Cuscuta hyalina Close-up of hilum. FNW taxon.
5376405 swamp dodder Cuscuta gronovii Close-up of hilum. Similar to an FNW taxon.
5376403 clover dodder Cuscuta epithymum Close-up of hilum. Similar to an FNW taxon.
5376401 flax dodder Cuscuta epilinum Close-up of hilum. Similar to an FNW taxon.
5376399 Chinese dodder Cuscuta chinensis Close-up of hilum. FNW taxon.
5376397 Australian dodder Cuscuta australis Close-up of hilum. FNW taxon.
5376394 common crupina Crupina vulgaris Close-up of fruit apex inside the pappus. FNW taxon.
5376392 common crupina Crupina vulgaris Fruit attachment scar. FNW taxon.
5376391 crupina Crupina crupinastrum Fruit attachment scar. Similar to an FNW taxon.
5376343 hedge bindweed Calystegia sepium Close-up of seed surface. Similar to an FNW taxon.
5376341 hedge bindweed Calystegia sepium Hilum. Similar to an FNW taxon.
5376388 dwarf morning-glory Convolvulus tricolor Hilum. Similar to an FNW taxon.
5376383 field bindweed Convolvulus arvensis Hilum. FNW taxon.
5376374 Benghal dayflower Commelina benghalensis Embryotega of seed. FNW taxon.
5376373 Benghal dayflower Commelina benghalensis Surface reticulation of seed. FNW taxon.
5376366 pilipiliula Chrysopogon aciculatus Close-up of sessile spikelets. FNW taxon.
5376358 hairy whitetop Lepidium appelianum Close-up of funiculus on seed. FNW taxon.
5376337 sterile oat Avena sterilis Dorsal view of primary floret bases. FNW taxon.
5376336 sterile oat Avena sterilis Ventral view of primary florets showing basal attachment scars. FNW taxon.
5376327 wild oat Avena fatua Ventral view of florets showing basal attachment scar. Similar to an FNW taxon.
5376326 wild oat Avena fatua Ventral view of florets with basal scars broken off. Similar to an FNW taxon.
5376323 slender oat Avena barbata Ventral view of florets showing basal scar. Similar to an FNW taxon.
5376312 onionweed Asphodelus fistulosus Surface detail of seed. FNW taxon.
5376295 croftonweed Ageratina adenophora Close-up of apex, showing stylar remnant. FNW taxon.
5376293 croftonweed Ageratina adenophora Fruit with apex (with partial pappus) at left. FNW taxon.
5376283 Russian knapweed Rhaponticum repens Close-up of fruit apex. FNW taxon.
5376284 Russian knapweed Rhaponticum repens Close-up of base of fruit. FNW taxon.
5408279 common mullein Verbascum thapsus
5391668 yellow unicorn-plant Ibicella lutea
5391659 yellow unicorn-plant Ibicella lutea
5392700 common mullein Verbascum thapsus Flower close-up
5392436 passionflower Passiflora spp. Flower
5392437 passionflower Passiflora spp.
5392373 crystalline iceplant Mesembryanthemum crystallinum Closeup of iceplant
5392226 satintail Imperata spp.
5392011 Australian-pine Casuarina equisetifolia A close-up of a male catkin
5362836 velvetleaf Abutilon theophrasti Close-up view of the seed capsule of velvetleaf (Abutilon theophrasti).
5358176 skeletonleaf bursage Ambrosia tomentosa Flowers and developing fruits of skeletonleaf bursage (Ambrosia tomentosa).
5358671 longspine sandbur Cenchrus longispinus Sandbur plant (Cenchrus longispinus) showing reddish color at the base.
5358670 puncturevine Tribulus terrestris Close-up view of the flowers of puncturevine (Tribulus terrestris).
5358667 common St. Johnswort Hypericum perforatum Close-up view of the flower of St. Johnswort (Hypericum perforatum).
5358665 common mullein Verbascum thapsus Close-up view of flowering stalks of common mullein (Verbascum thapsus).
5358663 Scotch thistle Onopordum acanthium Flower and flower buds on a Scotch thistle plant (Onopordum acanthium).
5358661 bull thistle Cirsium vulgare Close-up view of a leaf characteristic of bull thistle (Cirsium vulgare).
5358658 musk thistle Carduus nutans Close-up view of the stems of musk thistle (Carduus nutans) showing spiny flanges, with a flower bud in the background.
5358654 Dalmatian toadflax Linaria dalmatica Close-up view of the blossoms of Dalmatian toadflax (Linaria dalmatica).
5358652 Dalmatian toadflax Linaria dalmatica Close-up view of the inflorescence -- flowers and buds -- of Dalmatian toadflax (Linaria dalmatica).
5358649 yellow toadflax Linaria vulgaris Close-up view of yellow toadflax (Linaria vulgaris) flowers, showing the coloration that gives it the alternate name, "butter and eggs."
5358643 diffuse knapweed Centaurea diffusa Close-up view of a flower head and flower bud of diffuse knapweed (Centaurea diffusa), showing the spiny bracts.
5358639 spotted knapweed Centaurea stoebe ssp. micranthos Spotted knapweed plant, Centaurea stoebe ssp. micranthos (Centaurea maculosa), just beginning to bolt.
5358636 Russian knapweed Rhaponticum repens Close-up view of the stem and leaves of Russian knapweed (Acroptilon repens), showing characteristic fuzz (hairs, "knap").
5358632 Canada thistle Cirsium arvense Close-up view of buds and flower of Canada thistle (Cirsium arvense).
5358583 Queen Anne's lace, wild carrot Daucus carota Close-up view of the flowers of Queen Anne's Lace (Daucus carota).
5362882 common milkweed Asclepias syriaca Common milkweed (Asclepias syriaca) seedlings.
5362881 common milkweed Asclepias syriaca Common milkweed (Asclepias syriaca) seedlings.
5362879 field bindweed Convolvulus arvensis Seed capsules of field bindweed (Convolvulus arvensis).
5362877 field bindweed Convolvulus arvensis Field bindweed plant(s), Convolvulus arvensis, emerging from underground rootstocks.
5362875 Canada thistle Cirsium arvense Seedling (or young rosette) of Canada thistle, Cirsium arvense.
5362873 common cocklebur Xanthium strumarium Close-up view of the flower of common cocklebur (Xanthium strumarium).
5362872 common cocklebur Xanthium strumarium Common cocklebur (Xanthium strumarium) seedling with 2 true leaves.
5362867 common purslane Portulaca oleracea Close-up of a seedling common purslane plant (Portulaca oleracea).
5362866 common purslane Portulaca oleracea Close-up of a seedling common purslane plant (Portulaca oleracea).
5362863 hairy nightshade Solanum physalifolium Hairy nightshade plant (Solanum sarrachoides) -- young plant.
5362861 hairy nightshade Solanum physalifolium Immature fruits of hairy nightshade (Solanum sarrachoides), showing a star pattern.
5362859 hairy nightshade Solanum physalifolium Fruits of  hairy nightshade (Solanum sarrachoides), which do not darken to a blackish color.
5362858 hairy nightshade Solanum physalifolium Calyx details on the fruits of hairy nightshade (Solanum sarrachoides).
5362856 hairy nightshade Solanum physalifolium Seedling hairy nightshade plant (Solanum sarrachoides) with first set of true leaves.
5362855 hairy nightshade Solanum physalifolium Seedling hairy nightshade plant (Solanum sarrachoides).
5362854 cutleaf nightshade Solanum triflorum Cutleaf nightshade plant (Solanum triflorum).  
5362852 buffalobur Solanum rostratum Buffalobur plant (Solanum rostratum).
5362851 jimsonweed Datura stramonium Close-up view of a jimsonweed (Datura stramonium) pod.
5362848 jimsonweed Datura stramonium Close-up view of a jimsonweed (Datura stramonium) seedling, with cotyledons.
5362847 puncturevine Tribulus terrestris Close-up view of a flower and ripening seeds of puncturevine (Tribulus terrestris).
5362846 puncturevine Tribulus terrestris Seedling puncturevine (Tribulus terrestris) plant.
5362845 puncturevine Tribulus terrestris Seedling puncturevine (Tribulus terrestris) with cotyledons.
5362844 common mallow Malva neglecta Small plant of common mallow (Malva neglecta).
5362841 spurred anoda Anoda cristata Seedling spurred anoda (Anoda cristata) plants at the 2-leaf stage.
5362840 Venice mallow Hibiscus trionum Close-up view of the flower of Venice mallow (Hibiscus trionum).
5362839 Venice mallow Hibiscus trionum Small Venice mallow plant (Hibiscus trionum).
5362837 Venice mallow Hibiscus trionum Close-up view of the seedling of Venice mallow (Hibiscus trionum).
5362831 velvetleaf Abutilon theophrasti Seedling velvetleaf (Abutilon theophrasti).
5362828 toothed spurge Euphorbia dentata Close-up view of the flowers of toothed spurge (Euphorbia dentata).
5362826 toothed spurge Euphorbia dentata Close-up view of a seedling of toothed spurge (Euphorbia dentata) at the 2-leaf stage.
5362825 toothed spurge Euphorbia dentata Close-up view of a seedling of toothed spurge (Euphorbia dentata).
5362822 common sunflower Helianthus annuus Seedlings of common sunflower (Helianthus annuus).
5362821 common sunflower Helianthus annuus Seedlings of common sunflower (Helianthus annuus) with cotyledons.
5362820 Russian-thistle Salsola tragus Close-up view of a Russian thistle (Salsola iberica, S. tragus) flower.
5362818 Russian-thistle Salsola tragus Close-up view of a Russian thistle (Salsola iberica, S. tragus) seedling.
5362819 Russian-thistle Salsola tragus Close-up view of a Russian thistle (Salsola iberica, S. tragus) seedling.
5362815 Mexican fireweed Kochia scoparia Very close-up view of the yellow flowers of kochia (Kochia scoparia).
5362814 Mexican fireweed Kochia scoparia Close-up view of the flowers of kochia (Kochia scoparia).
5362813 Mexican fireweed Kochia scoparia Close-up view of the green stem of kochia (Kochia scoparia).
5361308 Mexican fireweed Kochia scoparia Close-up view of the red stem of kochia (Kochia scoparia).
5361307 Mexican fireweed Kochia scoparia Close-up view of variation in leaf shape and size in kochia (Kochia scoparia).
5361301 Mexican fireweed Kochia scoparia Seedling kochia (Kochia scoparia) with multiple side shoots.
5361300 Mexican fireweed Kochia scoparia Seedling of kochia (Kochia scoparia) in early spring.
5361299 lambsquarters Chenopodium album Common lambsquarters (Chenopodium album) seedling at the 2-leaf stage.
5361296 redroot pigweed Amaranthus retroflexus Intermediate-size seedling of redroot pigweed (Amaranthus retroflexus).
5361294 redroot pigweed Amaranthus retroflexus Seedling of redroot pigweed (Amaranthus retroflexus) at the 2-leaf stage.
5361293 redroot pigweed Amaranthus retroflexus Seedling of redroot pigweed (Amaranthus retroflexus) at the cotyledon stage.
5362339 puncturevine Tribulus terrestris Puncturevine (Tribulus terrestris).
5361782 puncturevine Tribulus terrestris Puncturevine (Tribulus terrestris) -- close-up view of stem, leaves, and a flower.
5363588 tall morningglory Ipomoea purpurea Close-up view of the flowers of tall morningglory (Ipomoea purpurea).
5358459 devil's-claw Proboscidea louisianica Close-up of drooping flowers and foliage of devil's claw (Proboscidea sp.).
5361297 redroot pigweed Amaranthus retroflexus Close-up view of a dense infestation of redroot pigweed (Amaranthus retroflexus) in field corn.
5361787 johnsongrass Sorghum halepense Close-up view of the flower head of johnsongrass (Sorghum halepense) emerging from the boot. Plant is growing in a field of dry beans.
5362590 buffalobur Solanum rostratum Buffalobur (Solanum rostratum) -- and the flower of puncturevine (Tribulus terrestris) -- growing as weeds in a dry bean field.
5366614 common purslane Portulaca oleracea Close-up view of common purslane (Portulaca oleracea), showing foliage and portion of a flower, growing in an onion field.

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