Difference between revisions of "Xyris tennesseensis"
Rhodora 80: 444, figs. a–e. 1978.
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|genus=Xyris | |genus=Xyris | ||
|species=Xyris tennesseensis | |species=Xyris tennesseensis |
Latest revision as of 21:32, 5 November 2020
Herbs, perennial, cespitose, 30–70 cm, base bulbous in maturity. Stems compact. Leaves ascending, 15–45 cm; sheaths soft, base pink or red; blade deep green, linear, flattened, somewhat twisted, 5–10 mm wide, smooth, margins somewhat scabrous. Inflorescences: scape sheaths exceeded by leaves; scapes linear, terete, distally somewhat compressed, 1 mm wide, 2–5-ribbed, ribs papillate; spikes ellipsoid to broadly ovoid, 10–15 mm; fertile bracts (5.5–)6–6.5(–7) mm wide, margins entire, apex rounded. Flowers: lateral sepals included, slightly curved, (4.5–)5 mm wide, keel scarious, lacerate; petals unfolding midday, blade obovate, 4.5 mm; staminodes bearded. Seeds opaque, ellipsoid, 0.5-0.6 mm, finely and irregularly ridged. 2n = 18.
Phenology: Flowering summer–fall.
Habitat: Fens and seeps over calcareous rock, streambanks in calcareous districts
Elevation: 0–250 m
Distribution
![V22 9-distribution-map.jpg](/w/images/6/60/V22_9-distribution-map.jpg)
Ala., Ga., Tenn.
Discussion
Xyris tennesseensis is unusual in habitat since because its sites are usually basic and its associates are fen or basic soil plants.
Of conservation concern.
Selected References
None.