Sicyos angulatus bur cucumber Cucurbitaceae SIAN2; Bx, bg (?), br, bz, pb, wv; NY, hb; Q, cu, f; K, fs, p; R, c, gr, h, is;

Sicyos angulatus.Frank Bramley.Copyright © 2014 New England Wild Flower Society.gobotany.newenglandwild.org

Sicyos-angulatus, young fruit.Frank Bramley. Copyright © 2014 New England Wild Flower Society.gobotany.newenglandwild.org. (Accessed 7/2014).

Sicyos angulatus is an annual vine, stems sticky-hairy, climbing to over 3 meters by 3-forked tendrils opposite each leaf; seedling leaves very large about 10 cm long, 4 cm wide, fleshy, mid-May.

Sicyos angulatus.female flowers.CaribbeanGarden.©-2017 Etsy Inc.etsy.com

Sicyos angulatus.female flowers.CaribbeanGarden.©-2017 Etsy Inc.etsy.com (Accessed 3/2017).

Leaves alternate, broad, with 3-5 shallow, toothed lobes, tips pointed, base deeply, round-lobed. 

Flowers whitish, small, petals united, 5-lobed, 0.8-1 cm wide, sexes separate on same plant (monoecious); male flowers ca 1 cm, in unbranched clusters; female flowers in small, round, dense clusters both on long stems in leaf axils; blooming and fruiting July-Sept. 

Sicyos-angulatus.Frank Bramley. Copyright © 2014 New England Wild Flower Society.gobotany.newenglandwild.org(2)

Sicyos angulatus.flowers.Frank Bramley.Copyright © 2014 New England Wild Flower Society.gobotany.newenglandwild.org. (Accessed 5/2014).

Fruit becoming dry, hollow, spiny-bristly, 2 cm long, 1-seeded, oval, drying bladder-like, in dense round clusters of 3-20. 

Wetland status: FACU. 

Frequency in NYC: Occasional. 

Origin: Native. 

Sicyos angulatus male flowers.Caribbean Garden.© 2017 Etsy, Inc.© 2017 Etsy, Inc.etsy.com

Sicyos angulatus male flowers.Caribbean Garden.© 2017 Etsy, Inc.© 2017 Etsy, Inc.etsy.com (Accessed 3/2017).

Habitat: Moist second growth, flood plains, edges, open areas or part shade, climbing on other vegetation. 

Notes: differentiated from Echinocystis lobata by its hairy stems, 5-lobed flowers and small, bristly fruit, in dense clusters.