Eriocaulon decangulare
Eriocaulon ravenelii
ten-angle pipewort
Ravenel's pipewort
linear or linear-attenuate, abruptly, then gradually, narrowing, 10–40(–50) cm, apex acute or obtuse.
linear-attenuate, 3–7(–15) cm, apex subulate, flat.
scape sheaths shorter than principal leaves;
scapes linear, distally 1–2(–3) mm wide, multiribbed;
heads dull white, hemispheric to nearly globose, 7–15 mm wide, hard, very slightly flattened when pressed;
receptacle copiously hairy;
involucral bracts reflexed, obscured by reflexed proximal bracteoles and flowers, straw-colored, narrowly ovate to lanceolate, 2–4 mm, margins erose to entire, apex acute, glabrous or apex with white, club-shaped hairs;
inner bracts and receptacular bracteoles pale, linear to oblong or lanceolate, 3–4 mm, margins entire, sometimes becoming erose, apex narrowly acuminate, glabrous or apex with white, club-shaped hairs.
scape sheaths shorter than leaves, loose;
scapes filiform, 0.5 mm wide, 4–5(–6)-ribbed;
heads gray-brown to dark gray, nearly globose or ovoid, 3–4 mm wide, relatively soft;
receptacle glabrous or with sparse, clear hairs;
outer involucral bracts usually not reflexed, not obscured by bracteoles and perianth, gray, ovate-oblong or broadly spatulate, 2 mm, margins nearly entire, apex narrowly rounded to acute, surfaces glabrous;
inner bracts, receptacular bracts gray, very lustrous, narrowly ovate to oblong or spatulate, 2 mm, margins nearly entire, apex acute to acuminate or lacerate, glabrous.
sepals 2, yellow-white, linear, curved, 3 mm, distal surface abaxially, adaxially with white, club-shaped hairs;
androphore club-shaped;
petals 2, yellow-white, translucent, triangular to linear, nearly equal, with small tuft of white, club-shaped hairs abaxially at apex;
stamens 4;
anthers black.
sepals 2, gray, oblong to oblanceolate, 1.5–2 mm, apex usually acute, glabrous;
androphore narrowly club-shaped;
petals 2, pale, scalelike, minute, glabrous, with inconspicuous glands;
stamens 4;
anthers black.
sepals 2, yellow-white, linear, 2–3 mm, apex acute, abaxially with white, club-shaped hairs at apex;
petals 2, pale, spatulate or narrowly elliptic, 1–2 mm, abaxially with translucent hairs proximally, white, club-shaped hairs distally, or adaxially glabrescent;
pistil 2-carpellate.
sepals 2, gray, narrowly oblong to lance-linear, 1.5–2 mm, apex acute, glabrous;
petals 2, yellow-white, narrowly oblanceolate or oblong, 1.5–2 mm, apex acute, glabrous or with a few hairs at apex or adaxially, with inconspicuous glands;
pistil 2-carpellate.
pale brown, ellipsoid, 0.75–1 mm, very finely cancellate or sometimes with cancellae concealed by rows of delicate nearly appressed hairs.
dark brown, somewhat lustrous, broadly ellipsoid, 0.5 mm, conspicuously irregularly pale-reticulate, alveolae mainly rectangular.
Eriocaulon decangulare
Eriocaulon ravenelii
A possible variety, Eriocaulon decangulare var. latifolium Chapman ex Moldenke [in N. L. Britton et al., N. Amer. Fl. 19(1): 21. 1937], has yet to be thoroughly investigated. This plant typically is in the taller range and has thicker stems and scapes than in the type; it has very stiff blunt leaves to 50 cm × 13–20 mm with thicker scapes, heads 13–20 mm wide, and floral parts in the high range for the species. It occurs in wetter situations than usual for the species, and (fide R. R. Haynes, pers. comm.) flowers later. This morphology occurs in northwestern Florida and southern Alabama within boggy edges of cypress-titi-Nyssa on permanently wet substrates.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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