Xyris laxifolia |
Xyris baldwiniana |
|
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laxleaf yelloweyed grass |
Baldwin's yelloweyed grass |
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Habit | Herbs, perennial, densely cespitose, 15–40(–50) cm. | |
Leaves | erect or ascending, 10–30 cm; sheaths glossy light brown or red-brown, firm; blade green, linear to filiform, often angularly terete, or sulcate, rarely to 1mm wide. |
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Inflorescences | scape sheaths exceeded by leaves; scapes linear, straight or flexuous, terete, 1 mm wide, rarely 1-ribbed; spikes ovoid to ellipsoid, 4–7 mm, apex acute; fertile bracts 4–5 mm, margins entire or erose, apex rounded. |
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Flowers | lateral sepals included, reddish brown, slightly curved, less than 5 mm, keel scarious, lacerate from middle to tip; petals unfolding in morning, blade obovate, to 5 mm; staminodes beardless. |
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Seeds | translucent, fusiform to cylindric, (0.7–)0.8–1 mm, finely lined longitudinally. |
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2n | = 18. |
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Xyris laxifolia |
Xyris baldwiniana |
|
Phenology | Flowering late spring–fall. | |
Habitat | Moist to wet sands, sandy peats of bogs, pine savanna, ditches and low cleared areas, coastal plain | |
Elevation | 0–200 m (0–700 ft) | |
Distribution |
AL; AR; FL; GA; LA; MS; NC; SC; TN; TX; VA; Mexico; Central America; South America
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AL; AR; FL; GA; LA; MS; NC; SC; TX; Mexico (Chiapas); Central America (Belize, Honduras, Nicaragua)
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Discussion | Varieties 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The beardless staminodes and the long, translucent seeds distinguish Xyris baldwiniana. Its leaf blades vary from terete to flat, and in eastern Texas and North Carolina the flat-leaved ones have been mistaken for X. elliottii. This same problem exists in Floridian narrow-leaved X. elliottii, which bears a strong resemblance to X. baldwiniana but has bearded staminodes and larger spikes. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Xyridaceae > Xyris | Xyridaceae > Xyris |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | X. baldwiniana var. tenuifolia, X. juncea, X. setacea | |
Name authority | Martius: Flora (Akureyri) 24(2 Beibl.):53. (1841) | Schultes: in J. A. Schultes and J. H. Schultes, Mant. 1: 351. (1822) |
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