126 NORTH AMERICAN FLORA [VoLumME 21 
2. Centrostachys aspera (L.) Standley, Jour. Wash. Acad. Sci. 
5: 75. 1915. 
Achyranthes aspera 1,. Sp. Pl. 204. 1753. 
Achyranthes argentea Lam. Encyc. 1: 545. 1785. 
Achyranthes sicula Roth, Catal. Bot. 1: 39. 1797. 
Cadelaria sicula Raf. Fl. Tell. 3: 39, 1837. 
Stachyarpagophora aspera Maza, Fl. Haban. 93. 1897. 
Ascending or decumbent annual or perennial; stems simple or branched, 3-10 dm. long, 
the branches ascending, quadrangular, pilose; petioles 4-25 mm. long; leaf-blades oval, ovate- 
oval, or ovate, 4-20 em. long, 2-9 cm. wide, rather abruptly acuminate or long-actminate at 
the apex, obtuse to abruptly acuminate at the base, thin, green and pilose-strigose on the 
upper surface, paler beneath and pilose-sericeous, often densely so; flowers spicate, the spikes 
terminal or axillary, 4-30 em. long, 10-12 mm. thick, acute, the rachis densely white-villous; 
bracts and bractlets glabrous, ovate, long-aristate; sepals lanceolate, 6~7 mm. long, long- 
acuminate, not nerved, subcartilaginous, glabrous; staminodia slightly shorter than the fila- 
ments, subquadrilateral, obtuse, entire, produced dorsally into a laciniate keel; style slightly 
longer than the stamens; utricle oblong, truncate at the apex, glabrous; seed narrowly oblong, 
3mm. long, fuscous, dull. 
TYPE LOCALITY: Sicily. 
Distrisution: Adventive in southern Florida; West Indies; central Mexico to Guatemala; 
also from the southern coast of Europe to Africa and southern Asia. 
InLusTRATIONS: Lam. Tab. Encyc. pl. 168, f. 1; Sibth. Fl. Graeca pl. 244; E. & P. Nat. Pfl. 3": 
f- 47, D, E; Fiori & Paol. Ic. Fl. Ital. f. 1043. 
IV. BRAYULINEAE. Prostrate perennial herbs. Leaves opposite. 
Flowers perfect; perianth 5-lobed. Stamens 5, perigynous, inserted on the 
tube of the perianth; anthers 2-celled. Ovary l-ovuled, the ovule pendulous. 
Radicle superior. 
A single genus. 10. BRAYULINEA. 
10. BRAYULINEA Small, Fl. SE. U.S. 394. 1903. 
Guilleminea H. B. K. Nov. Gen. & Sp. 6: 40. 1823. Not Guilleminia Neck. 1790. 
Prostrate, much branched, densely leafy, lanate, perennial herbs. Leaves opposite, 
those of each pair with unequal, entire blades, petiolate, the petioles connate at the base. 
Flowers perfect, small, glomerate in the axils of the leaves, sessile or subsessile, bracteate and 
bibracteolate, the bracts and bractlets subequal; perianth campanulate, lanate, the tube ob- 
conic, the limb 5-lobed, the lobes membranaceous. Stamens 5, perigynous, inserted at the 
base of the perianth-lobes; filaments triangular-subulate, shortly connate at the base; anthers 
ovoid, 2-celled. Ovary compressed; style short; stigma emarginate; ovule 1, suspended from 
the elongate funicle. Utricle membranaceous, indehiscent. Seed inverted, lenticular or 
compressed-globose, smooth; embryo annular; radicle superior. 
Type species, Illecebrum densum Willd. 
1. Brayulinea densa (Willd.) Small, Fl. SE. U.S. 394. 1903. 
Illecebrum densum Willd.; R. & S. Syst. Veg. 5: 517. 1819. 
Guilleminea illecebroides H. B. K. Nov. Gen. & Sp. 6: 42. 1823. 
Guilleminea Illecebrum Spreng. Syst. 4: Cur. Post. 103. 1827. 
Guilleminea densa Mog. in DC. Prodr. 13?: 338. 1849. 
Achyranthes conferta Pavon; Mog. in DC. Prodr. 13?: 338, as synonym. 1849. 
Guilleminea densa aggregata Uline & Bray, Bot. Gaz. 20: 343. 1895. 
Stems numerous from a thick vertical root, much branched, prostrate, 5-25 cm. long, 
stout, densely lanate; basal leaves evanescent or wanting, long-petiolate, the blades oblance- 
olate or obovate, obtuse or acutish; cauline leaves short-petiolate, the petioles winged, the 
blades elliptic to broadly oval, asymmetric, 3-15 mm. long, 1.5-9 mm. wide, obtuse or acute 
at the apex, abruptly narrowed at the base, green and glabrous on the upper surface or sparsely 
villous when young, densely villous or lanate beneath; flowers densely glomerate, the glomerules 
much shorter than the leaves; bracts ovate, acute, scarious, white, glabrous; bractlets oblong- 
ovate, obtuse; calyx 2-2.5 mm. long, slightly longer than the bractlets, the tube densely lanate, 
