Lachnocaulon anceps (Walter) Morong

Herbs, perennial, cespitose, forming domes of rosettes, 15--40 cm. Leaves narrowly to broadly linear, gradually attenuate, 2.5--6(--12) cm. Inflorescences: scape sheaths as long as leaves; scapes filiform, 0.5 mm thick distally, obscurely 4--5-ribbed, pilose from base to apex (s Florida extreme of species glabrous-scaped); mature heads whitish to pale gray, globose to short-cylindric, 4--7(--9) mm wide; receptacle densely pilose; outer involucral bracts becoming reflexed, brownish, oblong to triangular, 1--1.5 mm, apex acute or obtuse, surfaces hairy abaxially and at margins; receptacular bracts dark brown, mostly spatulate, 1.5--2 mm, apex obtuse, distally with white, club-shaped hairs. Staminate flowers: sepals 3, dark brown, narrowly spatulate, 1.5--2 mm, apex acute, abaxially with white hairs; androphore pale, narrowly club-shaped, 1.5 mm, glabrous; stamens 3, appendages 3. Pistillate flowers: sepals 3, pale, oblong to broadly linear, 2 mm (enlarging to 3 mm), apex acute, distal abaxial surface pubescent, hairs white; gynoecium 3-carpellate; stylar column pale, dilated apically, appendages 3. Seeds pale to dark brown, not lustrous, ellipsoid, 0.5--0.55 mm, longitudinal ribs conspicuous, pale, transverse ribs less conspicuous, pattern fine but coarser than in L. beyrichianum.

Ala., Fla., Ga., La., Miss., N.C., S.C., Tenn., Tex., Va.; West Indies (Cuba).

Flowering spring--summer.

Moist sands and peats of shores, pine savanna, bog and seep edges, flatwoods clearings; 0--400m.

Eriocaulon anceps Walter, Fl. Carol., 82. 1788; E. villosum Michaux; Lachnocaulon floridanum Small; L. glabrum Körnicke

Lachnocaulon glabrum Korn. Linnaea 27: 568. 1856
Stems abbreviated; leaves tufted, spreading and ascending, bright-green, linear-lanceolate, 2.5-5 cm. long, up to 2.6 mm. wide at the middle, gradually attenuate toward apex, rather obtuse, plane, longitudinally striate, glabrous; peduncles aggregate, 2-15, mostly few, 6.5-30 cm. long, twisted, 3-costate, glabrous; sheaths rather loose, 4—6 cm. long, glabrate, often deeply split, the blade rather short, abruptly long-attenuate, often patent, often more or less sparsely ciliate; heads at first hemispheric, finally vertically elongate, sordid-white or grayish-villose, 3-5 mm. in diameter; involucral bractlets grayish-fuscous, obovate, obtuse, ciliate, glabrous on the back; receptacle very pilose; receptacular bractlets fuscous, spatulate-obovate, rather obtuse, comose-pilose on the upper portion of the back; staminate florets: sepals nigrescentolivaceous, obovate, very obtuse, paler at base, comose with long clavate hairs in an apical tuft on the back; anthers white, oblong; pistillate florets: sepals light-brunneous or stramineous, hyaline at base, oblong-obovate, rather obtuse, comose on the upper portion of the back; styleappendages 3; stigmas 3, bifid; ovary elliptic-spheroid or subrotund, 3-locular; seeds cancellate.
Type locality: Florida (" Cabanis;" probably Leitner) .
Distribution: Pinelands, damp woods, and wet sandy places on the Coastal Plain in Florida and Alabama.

Lachnocaulon anceps (Walt.) Morong, Bull. Torrey Club 18:
360. 1891.
Eriocaulon anceps Walt. Fl. Car. 83. 1788.
Eriocaulon villosum Miehx. Fl. Bor. Am. 2: 166. 1803.
?Eriocaulon pubigerum Bong. Mem. Acad. St.-Petersb. VI. 1: pi. 42. 1831.
Lachnocaulon Michauxii Kunth, Enum. PI. 3: 497. 1841.
Stems abbreviated; leaves tufted, bright-green, olivaceous in age, linear-lanceolate, 3-7 cm. long, 2-2.5 mm. wide at the middle, plane, gradually narrowed toward the rather obtuse apex, striatulate, sparsely long-ciliate on the margins or entirely glabrous in age; peduncles solitary or aggregate, 1-12, usually few, 10-39 cm. long, 3-costate, glabrous, twisted, densely pubescent with long erecto-patent hairs; sheaths 2-7 cm. long or longer, pilose, obliquely split at apex, the blade long, rather obtuse, ciliate; heads white or pale-gray, obconic-globose or hemispheric, 3-6 mm. in diameter, villose; involucral bractlets fuscous or olivaceous-grayish, ovate or obovate, obtuse or subacute, longvillose on the back at apex; receptacle densely villose; receptacular bractlets olivaceous fuscous, spatulate, very obtuse, pilose on the back at apex; staminate florets: sepals fuscous, oblong-obovate, connate at base, rounded-obtuse and comose at apex; pistillate florets: sepals free, whitish, oblong-spatulate, longer than the receptacular hairs, obtuse or acute, pilose at apex; style-appendages 3; stigmas 3, bifid; ovary ellipticspheroid, 3-locular; seeds ellipsoid, about 0.8 mm. long, conspicuously cancellate.
Type locality: "Carolina" (Walter).
Distribution: Sandy places and low or moist pinelands on the Coastal Plain from Virginia to Florida and Texas and on the Appalachian Plateau in Alabama; also on the Isle of Pines, Cuba.

Lachnocaulon floridanum Small, Fl. SE. U. S. 235, 1328. 1903
Stems abbreviated; leaves linear, 2-4.5 cm. long, less attenuate than in the following species, manifestly cellular at base, sparingly ciliate; peduncles aggregate, 3-18, mostly numerous, 3-11 cm. long, twisted, glabrous; heads dark-gray, globose, 2.5-3.5 mm. in diameter at maturity; involucral bractlets light-brown, darker at apex, obovate, acute, comose at ape on the back; receptacle very pilose; receptacular bractlets light-brown, with a whitish midrib. spatulate or obovate-spatulate, concave, slightly subcarinate, ciliate with clavate hairs; staminate florets: sepals united only at the base, brown, obovate, concave, rounded or obtuse; anthers white, oblong; pistillate florets: sepals brown, obovate, conduplicate-carinate, subacute, ciliate; style-appendages 3; stigmas 3, bifid; ovary spheroid, 3-locular; seeds about 0.5 mm. long.
Type locality: Eustis, Lake County, Florida (Nash 1981). Distribution: Low sandy places in peninsular Florida.

Lachnocaulon anceps là một loài thực vật có hoa trong họ Eriocaulaceae. Loài này được (Walter) Morong mô tả khoa học đầu tiên năm 1891.