158 NORTH AMERICAN FLORA [VorumE 21 
beneath along the veins, the leaves of the inflorescence smaller, mostly linear or lance-linear; 
flowers perfect, loosely paniculate, the panicles pyramidal, leafy below, the branches very 
slender, often flexuous, ascending or spreading, the spikelets short or elongate, usually peduncu- 
late, the rachis lanate; bracts broadly ovate, acute, the bractlets ovate, cuspidate-acuminate, 
twice as long as the bracts and equaling the calyx, hyaline, brown or brownish, glabrous or 
villous; sepals elliptic-oblong, acute or acutish, mucronulate, 1.5 mm. long, 1-nerved, greenish, 
densely villous, the hairs soft, sordid-whitish or pale-brown, 2 or several times as long as the 
sepals, the staminodia minute; style short, the stigmas slender; utricle orbicular, compressed; 
seed orbicular, 0.7 mm. broad, dark reddish-brown, shining. 
Type Locatiry: Gustavia, Island of St. Bartholomew, West Indies. 
DistRIBuTION: Vera Cruz; Lower California; Costa Rica and Panama; West Indies; also from 
Colombia to Ecuador and Brazil. 
ILLUSTRATIONS: Lam. Tab. Encyce. pl. 813, f. 2; Mart. Nov. Gen. & Sp. fl. 155; Fawe. & 
Rendle, Fl. Jam. 3: f. 48. 
7. Iresine arenaria Standley, Contr. U. S. Nat. Herb. 18: 93. 
1916. 
Erect perennial, suffrutescent at the base, much branched, the branches slender, erect- 
ascending, green, striate, glabrous; petioles slender, 4-5 mm. long; leaf-blades linear to narrowly 
ovate, 2.5—4.5 cm. long, 2-12 mm, wide, acute or acuminate at the apex, obtuse to acuminate 
at the base, rather thick, deep-green, glabrous; flowers polygamous, narrowly paniculate, the 
panicles open or congested, nearly naked, 4-20 cm. long, the branches slender or stout, ascend- 
ing, short, the spikelets few, short or elongate, pedunculate or sessile, the rachis densely lanate; 
bracts and bractlets rounded-ovate, obtuse or acutish, short-cuspidate, hyaline, whitish- 
stramineous, densely short-villous; sepals oblong-oval, 1.5 mm. Jong, rounded at the apex, 
3-nerved, densely pilose with soft white hairs; filaments subulate-linear, shorter than the sepals, 
the staminodia one third as long as the filaments, narrowly triangular, entire; style short, the 
stigmas slender; utricle orbicular, compressed; seed orbicular, 1 mm. broad, dark reddish-brown, 
shining. 
Tyre LocaLity: Topolobampo, Sinaloa. . 
DIstRIBUTION: On sandy hillsides, vicinity of the type locality. 
8. Iresine Hartmanii Uline, Field Columb. Mus. Publ. Bot. 1: 422. 
1899. 
Erect shrub, 1.5-2.5 meters high, fruticose nearly throughout, the branches slender, terete, 
brownish or stramineous, villous-canescent when young but soon glabrate; petioles slender, 
3-7 mm. long; leaf-blades ovate to lanceolate, 3.5—-8 cm. long, 2—3.3 cm. wide, rounded or obtuse 
at the base, often unequal or short-decurrent, acuminate to attenuate at the apex, green, thinly 
canescent on the upper surface, appressed-pilose or canescent beneath; flowers polygamous, 
in loose naked open panicles, the spikelets mostly pedunculate, densely flowered, 5-15 mm. long, 
4 mm. thick; bracts and bractlets one third to one half as long as the perianth, stramineous 
or whitish, ovate to ovate-orbicular, rounded or obtuse at the apex, glabrous; sepals oblong, 
2 mm. long, densely white-lanate; filaments half as long as the sepals, the staminodia slender, 
about equaling the filaments; stigmas short and stout. 
Type LocaLiry: Granados, Sonora. 
DisTRIBUTION: Sonora and Durango. 
9. Iresine completa Uline & Bray, Bot. Gaz. 21: 349. 1896. 
Much branched shrub, erect or scandent, the branches slender, terete, glabrate, the 
young ones and those of the inflorescence canescent; petioles 5-7 mm. long; leaf-blades elliptic- 
oblong or broadly ovate-oblong, 5-9 cm. long, 2-4.5 cm. wide, acuminate or abruptly long- 
acuminate at the apex, obtuse or rounded at the base, thin, deep-green, glabrate on the upper 
surface, sparsely appressed-pilose beneath; flowers perfect, paniculate, the panicles terminal 
or axillary, naked, short, 7-15 cm. long, narrow, the branches short, opposite or verticillate, 
spreading or ascending, the spikelets short, usually pedunculate; bracts and bractlets one 
