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fringe yellow star-grass, rushy hypoxis

common yellow stargrass, Curtis' star-grass

Leaves

0.3–1 mm wide, hard, stiff, nearly glabrous or with scattered trichomes near base.

3–12 mm wide, soft, flexible, glabrous or nearly so.

Scape

(5–)6–16(–19) cm.

(4–)5–13(–27) cm.

Inflorescences

racemose, 1–2(–3)-flowered;

proximal 2 flowers, when present, not paired;

bracts 1–7(–12) mm.

racemose, 1–3(–7)-flowered;

proximal 2 flowers, when present, not paired;

bracts (3–)5–20(–80) mm.

Flowers

tepals 6–13(–15) × 2–4 mm, usually shorter than pedicel, longer than ovary;

anthers (1.3–)1.8–3.3 mm;

ovary obconic, (2–)3–5(–7) × 1.5–2.5 mm, densely pubescent;

pedicel (5–)10–26(–28) mm, usually 2+ times longer than bracts.

tepals 4–8(–11) × 0.

Seeds

black, lustrous, 0.7–1 mm, with low, rounded sculpturing.

black, lustrous, 1.2–1.6 mm, coarsely muricate.

5

–2.1 mm, 2 or less times longer than pedicel, usually 2 or less times longer than ovary;

anthers 1–1.8 mm;

ovary cylindric, (2–)3–6(–7) × 1–3 mm, glabrate or sparsely pubescent;

pedicel (2–)5–12(–20) mm, usually shorter than bracts.

Hypoxis juncea

Hypoxis curtissii

Phenology Flowering year round, most commonly in spring. Flowering year round.
Habitat Seasonally flooded pinelands Riverbanks, floodplains
Elevation 0–100 m (0–300 ft) 0–100 m (0–300 ft)
Distribution
from FNA
AL; FL; GA; NC; SC
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; FL; GA; LA; MS; NC; SC; TX; VA
[WildflowerSearch map]
[BONAP county map]
Discussion

When not in flower, the rosettes of Hypoxis curtissii can be easily mistaken for Cyperus, which grows in the same habitats.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26, p. 203. FNA vol. 26, p. 202.
Parent taxa Liliaceae > Hypoxis Liliaceae > Hypoxis
Sibling taxa
H. curtissii, H. hirsuta, H. mexicana, H. rigida, H. sessilis, H. wrightii
H. hirsuta, H. juncea, H. mexicana, H. rigida, H. sessilis, H. wrightii
Synonyms H. filifolia H. erecta var. leptocarpa, H. hirsuta var. leptocarpa, H. leptocarpa
Name authority Smith: Spic. Bot., 15, plate 16. (1792) Rose: in J. K. Small, Fl. S.E. U.S., 287, 1329. (1903)
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