Plants — 23,508 Species

Round-headed Clubrush

Scirpoides holoschoenus (L.) Soják

Scirpoides holoschoenus, the roundhead bulrush, is a perennial Cyperaceae sedge that grows in freshwater habitats up to 0.75 m tall.

dark green bulrush

Scirpus atrovirens Willd.

Scirpus atrovirens (dark-green bulrush) is a perennial wetland sedge native to eastern North America.

woolgrass

Scirpus cyperinus (L.) Kunth

Scirpus cyperinus, or woolgrass, is a native North American wetland sedge used historically by Native Americans for crafts and bedding.

Panicled Bulrush

Scirpus microcarpus J.Presl & C.Presl

Scirpus microcarpus is a North American native perennial sedge that grows in moist and wet habitats.

nodding bulrush

Scirpus pendulus Muhl.

Scirpus pendulus, also called pendulous bulrush, is a perennial sedge native to North America and introduced to Australia.

Creeping Club-rush

Scirpus radicans Schkuhr

Scirpus radicans Schkuhr is a perennial herb with a detailed morphological description and a known chromosome count of 2n=56.

Wood Club-rush

Scirpus sylvaticus L.

Wood clubrush (Scirpus sylvaticus) is a perennial wetland sedge widespread in Eurasia, that is an important food source for waterfowl.

Annual Knawel

Scleranthus annuus L.

Scleranthus annuus L. is an annual or biennial low-growing herb with three life strategies, most often self-pollinated, growing in open, rocky or disturbed habitats.

Perennial Knawel

Scleranthus perennis L.

Scleranthus perennis is a small perennial herb in Caryophyllaceae, historically the main host of the economically important Polish cochineal.

Scleria terrestris (L.) Fassett

Scleria terrestris (L.) Fassett

Scleria terrestris is a rhizomatous perennial sedge native to much of Asia and Australia, growing in varied wet and dry habitats.

Whip Nutrush

Scleria triglomerata Michx.

Scleria triglomerata (whip nutrush) is a Cyperaceae plant found in the US and Canada across multiple habitats.

Low Nutrush

Scleria verticillata Muhl. ex Willd.

Scleria verticillata, low or whorled nutrush, is a Cyperaceae plant native to Canada, the US, The Bahamas, and Cuba.

Johnson's Beehive Cactus

Sclerocactus johnsonii (Parry ex Engelm.) N.P.Taylor

Sclerocactus johnsonii is a small cactus species native to the southwestern US and northwestern Mexico, found in desert scrub habitat.

Mojave Fishhook Cactus

Sclerocactus polyancistrus (Engelm. & J.M.Bigelow) Britton & Rose

Sclerocactus polyancistrus is a clustered, spiny cactus native to the Mojave Desert that produces fragrant pink to red-violet flowers.

Tropical Bonebract

Sclerocarpus divaricatus (Benth.) Benth. & Hook.fil. ex Hemsl.

Mexican bonebract

Sclerocarpus uniserialis (Hook.) Benth. & Hook.fil. ex Hemsl.

Sclerocarpus uniserialis is an Asteraceae species native from southern US to Central America, that can act as a common crop weed.

marula

Sclerocarya birrea (A.Rich.) Hochst.

Sclerocarya birrea (marula) is an African dioecious tree valued for its edible fruit, with traditional and commercial human uses.

hardgrass

Sclerochloa dura (L.) P.Beauv.

Sclerochloa dura is an annual grass species native to Eurasia, introduced as a common weed in North America and Australia.

Duiker-berry

Sclerocroton integerrimus Hochst.

Sclerocroton integerrimus is a southern African tree with traditional medicinal, craft, and timber uses.

California fetid adderstongue

Scoliopus bigelovii Torr.

Scoliopus bigelovii is a California coastal understory herb pollinated by fungus gnats, sensitive to logging.

Thorn Pear

Scolopia zeyheri (Nees) Szyszyl.

Scolopia zeyheri is an evergreen much-branched shrub or tree named after German naturalist Carl Zeyher.

common golden thistle

Scolymus hispanicus L.

Scolymus hispanicus is an edible flowering thistle native to Europe, with a long history of medicinal and culinary use.

European scopolia

Scopolia carniolica Jacq.

Scopolia carniolica is a poisonous nightshade species native to Central and Southeastern Europe, containing toxic tropane alkaloids.

Caterpillar-plant

Scorpiurus muricatus L.

Scorpiurus muricatus is an annual legume native to Southern Europe and Syria, grown as garden groundcover and sometimes used in salads.