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Stylosanthes biflora (Linnaeus) Britton, Sterns, & Poggenburg. Pencil-flower. Phen: Jun-Aug; Jul-Oct. Hab: Longleaf pine sandhills, dry to moist (but not wet) pine savannas and flatwoods, dry forests, woodlands, woodland borders, glades, barrens, rock outcrops. Dist: S. NY west to OH, s. IL, and KS, south to c. peninsular FL and e. TX.

Origin/Endemic status: Native

Taxonomy Comments: Mohlenbrock (1957) studied variation in this species and did not choose to recognize variation taxonomically (see synonymy); a modern re-evaluation is perhaps warranted.

Synonymy : = Ar, C, FNA11.1, GrPl, Il, K1, K3, K4, NcTx, NY, Pa, RAB, SE3, Tn, Tx, Va, W, WH3, WV, Isely (1998), Mohlenbrock (1957); > Stylosanthes biflora (L.) Britton, Sterns, & Poggenb. var. biflora – F, G, S, S13, Tat; > Stylosanthes biflora (L.) Britton, Sterns, & Poggenb. var. hispidissima (Michx.) Pollard & Ball – F, G, S, S13, Tat; > Stylosanthes riparia Kearney – G, S, S13, Tat; > Stylosanthes riparia Kearney var. riparia – F; > Stylosanthes riparia Kearney var. setifera Fernald – F

Links to other floras: = Stylosanthes biflora - FNA11.1

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Heliophily : 7

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image of plant© Scott Ward | Original Image ⭷
image of plant© Sonnia Hill | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Joey Shaw source | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect to sprawling perennial of sandhills, dry to moist (but not wet) pine savannas and flatwoods, dry forests, woodlands, woodland borders, glades, barrens and rock outcrops.

Stems: Stems branched from the base, sometimes prostrate, usually covered with long, stiff, reddish hairs.

Leaves: Leaves alternate, on petioles with stipules that sheath the stem, divided into 3 elliptic to lance-shaped leaflets, each ½-1½ in. long with a sharp tip and usually very hairy.

Inforescence:

Flowers: Flowers in terminal and axillary clusters of 2-6, yellow, about 1/3 in. long, with typical pea-flower shape, including an erect "banner" petal that is often streaked with red.

Fruits: Fruit a hairy, sessile, oval pod with 2 segments.

Comments:

Height: 4-20 in.

plant sale text:

bloom table text:

description: Erect to sprawling perennial of sandhills, dry to moist (but not wet) pine savannas and flatwoods, dry forests, woodlands, woodland borders, glades, barrens and rock outcrops.

stems: Stems branched from the base, sometimes prostrate, usually covered with long, stiff, reddish hairs.

leaves: Leaves alternate, on petioles with stipules that sheath the stem, divided into 3 elliptic to lance-shaped leaflets, each ½-1½ in. long with a sharp tip and usually very hairy.

inflorescence:

flowers: Flowers in terminal and axillary clusters of 2-6, yellow, about 1/3 in. long, with typical pea-flower shape, including an erect "banner" petal that is often streaked with red.

fruits: Fruit a hairy, sessile, oval pod with 2 segments.

comments:

cultural notes:

germination code:

native range: eastern United States