Hypoxis curtissii
Hypoxis hirsuta
common yellow stargrass, Curtis' star-grass
common goldstar, common star-grass, eastern yellow stargrass
3–12 mm wide, soft, flexible, glabrous or nearly so.
(1–)2–5(–15) mm wide, soft, flexible, essentially glabrous or sparsely to densely pubescent.
(4–)5–13(–27) cm.
(4–)5–17(–25) cm.
racemose, 1–3(–7)-flowered;
proximal 2 flowers, when present, not paired;
bracts (3–)5–20(–80) mm.
umbellate, 1–5(–7)-flowered;
proximal 2 flowers, when present, always paired;
bracts (1–)2–10(–17) mm.
tepals 4–8(–11) × 0.
tepals (3–)6–10(–17) × 2–4 (–5) mm, shorter than pedicel, much longer than ovary;
anthers 1.5–3.5(–4) mm;
ovary obconic, (1–)2–4 × (1–)2–4 mm, densely pubescent;
pedicel (6–)9–25(–30) mm, usually 2+ times longer than bracts.
black, lustrous, 1.2–1.6 mm, coarsely muricate.
black, lustrous, (0.9–)1–1.5(–1.7) mm, coarsely muricate.
–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 curtissii
Hypoxis hirsuta
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.)
Very rarely, specimens of Hypoxis hirsuta have cylindrical ovaries and/or bracts nearly equaling the pedicels. These specimens are recognized by the umbelliform inflorescence typical of H. hirsuta. The condition appears to be pathological and is associated with a lack of seed development.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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