160 NORTH AMERICAN FLORA [VoLumE 21 
13. Iresine Wrightii Standley, Contr. U. S. Nat. Herb. 18: 97. 
1916. 
Shrub, the branches slender, terete, smooth, the young ones and those of the inflorescence 
densely canescent; petioles stout, 3-7 mm. long; leaf-blades obovate-oblong or oval-oblong, 
broadest above the middle, 7-9 cm. long, 3-4 cm. wide, acute at the apex, acute or acuminate 
at the base, rather thin, sparsely appressed-pilose beneath or glabrate; flowers perfect, panicu- 
late, the panicles pyramidal, loosely branched, naked, the branches spreading, opposite, the 
spikelets short, pedunculate or sessile; bracts and bractlets one third as long as the sepals, 
suborbicular, stramineous, sparsely short-villous or glabrate; sepals elliptic-oblong, 2.5 mm, 
long, acute, brownish-fuscous, faintly nerved, short-villous at the apex, pilose at the base, the 
hairs sordid-white, stiff, about equaling the sepals; filaments filiform, shorter than the sepals, 
the staminodia very short, entire; style short, the stigmas short and stout. 
TypPEx Locality: Nicaragua. 
DISTRIBUTION: Nicaragua. 
14, Iresine Palmeri (S. Wats.) Standley, Jour. Wash. Acad. Sci. 
5: 395. 1915. 
Hebanthe Palmeri S. Wats. Proc. Am. Acad. 18: 144. 1883. 
Scandent or decumbent shrub, much branched, the branches ascending, slender or stout, 
sharply angulate, glabrous, or sparsely puberulent when young; petioles 2-6 mm. long; leaf- 
blades lanceolate, narrowly ovate, or lance-oblong, 1.2-6 cm. long, 0.5-1.7 cm. wide, acute 
or acuminate or rarely obtuse at the apex, acttte and decurrent at the base, thick, bright-green, 
glabrous, the lateral veins obsolete or nearly so; flowers dioecious, the pistillate in short or 
elongate, very narrow, sparsely leafy panicles; spikelets loosely flowered, sessile or pedunculate, 
the rachis scaberulous; sepals of the pistillate flowers about as long as the bractlets, oval, 
1 mm. long, obtuse, sparsely pilose, obscurely nerved, the bracts and bractlets orbicular, 
stramineous or fuscous, strongly concave, glabrous, the hairs at the base of the perianth several 
times as long as the sepals, soft, sordid-whitish; filaments short, the staminodia wanting; style 
very short, the stigmas elongate, stout; utricle subglobose, exceeding the sepals; seed sub- 
globose, 1 mm. long, reddish-brown. 
TYPE LOCALITY: Guajuco, Nuevo Leén. 
DisTRIBUTION: Nuevo Leén and San Ij1is Potosi to Vera Cruz. 
15. Iresine interrupta Benth. Bot. Voy. Sulph. 156. 1844. 
Iveneis interrupta Mog. in DC. Prodr, 13?: 349. 1849. 
Alternanthera Richardii Mogq. in DC. Prodr. 132: 353. 1849. 
Iresine angustifolia Rich.; Moq. in DC. Prodr. 13?: 353, as synonym. 1849. 
Hebanthe subnuda Hemsl. ’ Biol. Centr. Am. Bot. 3: 20. 1882. 
Gossypianthus subnudus Kuntze, Rev. Gen. 543. 1891. 
Scandent or reclining shrub, much branched, often 5-6 meters long, the branches terete, 
striate, d-vergent, glabrous, or rarely short-villous when young, pale-green; petioles stout, 
0.5-5 cm. long; leaf-biades broadly ovate-rhombic to ovate or lanceolate, 4-15 cm. long, 1-10 
em. wide, acute to attenuate at the apex, rounded or obtuse at the base and very shortly 
decurrent, thick, sometimes very shortly villous when young, soon glabrous, prominently 
veined, the lateral veins divergent, the few leaves of the inflorescence small and narrow, some- 
times rounded at the apex; flowers dioecious, in broad or narrow, loose, sparsely leafy panicles, 
or the inflorescence sometimes congested in the pistillate plants; spikelets elongate or short, 
sessile or pedunculate; sepals of the staminate flowers oblong, 1.5-2 mm, long, whitish, scarious, 
densely villous; staminodia half as long as the filaments, denticulate at the apex or subentire; 
bracts of the pistillate flowers ovate-orbicular, nearly as long as the sepals, obtuse, mucronulate, 
stramineous, glabrous; sepals oval, obtuse, 1.5 mm. long, 3-nerved, usually greenish, villous, 
or sometimes glabrous at the apex, the basal hairs 2—4 times as long as the sepals, white; stigmas 
elongate, slender; seed suborbicular, 0.8 mm. broad, black and shining. 
Tyee LocaLity: Tepic. 
DIistRIBUTION: In thickets and among rocks, Sonora and San Luis Potosi to Guatemala. 
