164 NORTH AMERICAN FLORA [VorumE 21 
pilose; filaments shorter than the sepals, the staminodia very short, broad, dissected at the 
apex into short filiform segments, or rarely subentire; bracts and bractlets of the pistillate 
flowers nearly as long as the sepals, these lanceolate, attenuate, 1.5 mm. long, densely pilose 
with whitish or brownish hairs, very faintly nerved; style short, the stigmas slender, elongate; 
utricle globose-ovoid. 
TYPE LocALtry: District of Izficar de Matamoros, Puebla. 
DisTRIBUTION: Southern Lower California, Sonora, and Coahuila to Costa Rica. 
ILLUSTRATION: Naturaleza 4: pl. 3. 
25. Iresine inaguensis Millsp. Field Columb. Mus. Publ. Bot. 
2: 149. 1906. 
Perennial from a vertical woody root; stems several from each root, erect, stout, 3-9 dm. 
high, glabrous, sparingly branched, the branches erect, the internodes usually short, 0.5-8.5 cm. 
long; leaves very numerous, sometimes with fascicles of smaller leaves in the axils, linear, 2-6 
cm. long, 1-2.5 mm: wide, obtuse, attenuate to the base but scarcely petiolate, thick, glabrous, 
yellowish-green; inflorescence narrowly paniculate, 7-14 cm. long, 1.5-2.5 cm. wide, dense, 
sparingly branched, the branches erect or ascending, glabrous, sparsely leafy or naked; spike- 
lets densely flowered, alternate or opposite, 3-12 mm. long; bracts one third as long as the 
sepals or longer, ovate-orbicular, acutish, entire, stramineous; sepals oval-oblong, about 1 mm. 
long, obtuse or rounded, yellowish-white, those of the pistillate flowers prominently 3-nerved, 
bearing many long white hairs at the base, elsewhere glabrous; styles very short; utricle slightly 
shorter than the sepals; seed subreniform, 0.5 mm. long, dark-red, shining., 
TYPE Locality: Sheep Cay, Inagua, Bahama Islands. . 
DistRiButIon: Atwood Cay and Inagua, Bahama Islands. 
26. Iresine acicularis Standley, Contr. U. S. Nat. Herb. 18: 93. 
1916. 
Stems erect, very sparsely pubescent with short slender hairs, the internodes 10-23 cm. 
long; petioles slender, 1-5.5 cm. long; leaf-blades ovate or broadly ovate, 6.5-20 cm. long, 
3.5-10 em. wide, or those among the inflorescence somewhat smaller, rather abruptly long- 
attenuate or acute at the apex, rounded or obtuse at the base and abruptly short-decurrent, 
thin, bright-green, very sparsely villous on the upper surface with short, remote, soft, yellowish- 
white hairs, similarly pubescent beneath and furnished in addition with numerous appressed, 
shining, amber-colored or bright-yellow, acicular hairs, villous-ciliate, rather prominently 
veined, but the veins slender, diverging at angles of from 50 to 70 degrees; inflorescence a 
broad, dense, somewhat leafy panicle, 25 cm. long and 15 cm. broad, the rachises sparsely 
villous and bearing in addition numerous stout, acicular, glistening amber-colored or yellow 
hairs, these most abundant at the base of the spikelets; spikelets alternate, pedunculate or 
sessile, densely flowered, stout, 4-12 mm. long; bracts white, rounded-ovate to narrowly ovate, 
acute, from half as long to fully as long as the sepals; sepals about 1.5 mm. long, narrowly 
oblong, acute, those of the pistillate flowers 3-nerved, the flowers furnished at the base with 
copious long white wool; staminal cup not lobed; utricle shorter than the sepals; seed suborbicu- 
Jar, 0.5 mm. in diameter, dark reddish-brown, shining. 
Type Locatity: On the Volcan de Fuego, Department of Sacatepequez, Guatemala, at an 
altitude of 2700 meters. . 
DISTRIBUTION: Guatemala to Costa Rica. 
27. Iresine flavescens Humb. & Bonpl.; Willd. Sp. Pl. 4: 766. 
1805. 
Iresine obtusifolia H. B. K. Nov. Gen. & Sp. 2: 198. 1818. 
Alternanthera flavescens Moa. in DC. Prodr. 13?: 350. 1849. Not A. flavescens H. B. K. 1817. 
Achyranthes dioica Pavon; Mog. in DC. Prodr. 13?: 350, as synonym. 1849. 
Tresine keyensis Millsp. Field Columb. Mus. Publ. Bot. 2: 148. 1906. 
Perennial from a stout woody perpendicular root; stems 3-10 dm. high, stout, erect, 
suffrutescent below, glabrous, simple or much branched, especially near the base, the branches 
erect or ascending, the nodes usually swollen, the internodes 3-20 cm. long; leaves numerous 
