Rhynchospora harveyi |
Rhynchospora punctata |
|||||
---|---|---|---|---|---|---|
Harvey's beaksedge |
dotted beaksedge |
|||||
Habit | Plants perennial, cespitose, 70–110 cm; rhizomes absent. | Plants perennial, cespitose, 60–80 cm; rhizomes absent. | ||||
Culms | erect to excurved, leafy, obscurely trigonous, slender. |
erect or ascending, leafy, trigonous, slender. |
||||
Leaves | spreading to ascending, shorter than culm, crowded toward culm base; blades linear, proximally flat, 1–3 mm wide, gradually involute, apically trigonous, subulate. |
all exceeded by culm; basal blades spreading, often curled, distal longer, all proximally flat, 3–5 mm wide, apex trigonous, subulately tapering. |
||||
Inflorescences | spikelet clusters 1–4, dense to open, mostly irregularly turbinate; peduncles ascending, branches spreading to erect, ultimate branches with many spikelets; leafy bracts setaceoustipped, usually exceeding all clusters, or at least all but the distal. |
clusters 3–5, proximalmost distant, longest pedunculate, fascicles broadly turbinate to hemispheric; leafy bracts of distal groups mostly exceeded by inflorescence. |
||||
Spikelets | light redbrown or brown, broadly ellipsoid to lanceoloid, 3–4 mm, apex acute to acuminate; fertile scales ovate to obovate or suborbiculate, 2–3.5 mm apex acute to rounded or emarginate, midrib included or exserted as mucro. |
lanceovoid, (3.5–)4–5 mm; fertile scales broadly ovate to ± orbiculate, cupulate, rounded, 3 mm, apex apiculate to cuspidate, midrib excurrent. |
||||
Flowers | perianth bristles mostly 6, rarely reaching fruit midbody, antrorsely barbellate. |
perianth bristles 6, overtopping tubercle (or at least its base), antrorsely barbellate. |
||||
Fruits | mostly 1 per spikelet, 2–2.5 mm, body dark brown, obovoid to subglobose, tumid or lenticular, 1.5–1.7 mm, transversely finely rugose to nearly level, intervals with very small, pitlike alveoli. |
1–3 per spikelet, 2.3–3 mm; body brown, strongly compressed proximally, biconvex distally, broadly obovoid, 1.8–2.2 × 1.5 mm; surfaces strongly transversely rugose, intervals with rows of narrow, vertical alveolae; tubercle triangular, flat, 1 mm, base lunate, capping fruit apex, apiculate. |
||||
Rhynchospora harveyi |
Rhynchospora punctata |
|||||
Phenology | Fruiting spring–summer. | |||||
Habitat | Sands and peats of savannas, open pine-wiregrass flats, sandhills bogs ecotones | |||||
Elevation | 0–200 m (0–700 ft) | |||||
Distribution |
AL; AR; FL; GA; KS; LA; MO; MS; NC; OK; SC; TN; TX; VA; se United States; Midwestern |
FL; GA |
||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Rhynchospora punctata is similar to R. harveyi and R. compressa in its preference for more upland sites. Like R. compressa, R. punctata often has many imperfectly formed fruits, suggestive of hybrid origin. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 23, p. 231. | FNA vol. 23, p. 222. | ||||
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Phaeocephalum punctatum | |||||
Name authority | W. Boott: Bot. Gaz. 9: 85. (1884) | Elliott: Sketch Bot. S. Carolina 1: 60. (1816) | ||||
Web links |