Parr 2, 1917] AMARANTHACEAE 161 
16. Iresine rotundifolia Standley, Contr. U. S. Nat. Herb. 18: 96. 
1916. 
Low shrub, fruticose nearly throughout, much branched, the branches stout, ascending 
or divergent, dark-gray or blackish, the branchlets stout, densely tomentose; leaves few, 
remote, undeveloped at anthesis in the staminate plant; petioles stout, 1-4 mm. long; blades 
orbicular to broadly ovate-oval, 3.5~17 mm. long, 3.5~12 mm. wide, broadly rounded at the 
base, rounded or obtuse at the apex, sometimes emarginate, coriaceous, deep-green and puberu- 
lent or glabrate on the upper surface, densely yellowish-tomentose beneath, the veins con- 
spicuous beneath and usually evident on the upper surface; flowers dioecious; staminate 
spikelets 6-9 mmni. long, densely flowered, in fascicles of 2-4 at the ends of short fruticose 
branches; bracts and bractlets ovate-orbicular, less than a third as long as the sepals, scarious, 
yellowish-white, glabrous or nearly so, the sepals narrowly oblong, 3 mm. long, obtuse, sparsely 
short-villous at the apex; filaments slightly exserted, the tube very short, the starminodia 
minute; pistillate spikes (immature) short, densely flowered, in short natrow terminal panicles, 
the bracts and bractlets broadly ovate, obtuse or acute, fuscous, glabrate. 
TyP# LOCALITY: Vicinity of San Luis Tultitlanapa, Puebla. 
Dis7riBution: Puebla. 
17. Iresine Pringlei S. Wats. Proc. Am. Acad. 25: 161. 1890. 
Erect shrub, 1.5-3 meters high, much branched, the branches slender, ascending or 
spreading, terete, smooth, densely and finely canescent with branched hairs; petioles stout, 
4-7 mm. long; leaf-blades ovate or oblong-ovate, 4-8 cm. long, 1.5-3.5 cm. wide, acuminate 
or long-acuminate at the apex, obtuse at the base, rather thick, sparsely stellate-pubescent or 
glabrate on the upper surface, densely stellate-tomentose beneath; flowers dioecious, loosely 
paniculate, the panicles 1.5-3 dm. long and about as wide, sparsely leafy below, the branches 
slender, divaricate or ascending; spikelets short, mostly sessile, the rachis lanulose; bracts 
and bractlets rounded-ovate, half as long as the sepals or nearly equaling them, hyaline, pale- 
stramineous, glabrous, often denticulate; sepals of the staminate flowers oblong or oval, obtuse 
or rounded at the apex, densely villous; filaments as long as the sepals, the staminodia minute; 
sepals of the pistillate flowers ovate, 1.5 mm. long, long-acuminate, coarsely 3-nerved, bright- 
green along the nerves, densely villous, the basal hairs longer than the sepals, soft, white, the 
tips of the sepals connivent; stigmas elongate, slender; seed 0.6 mm. long, brown, shining. 
Type Locaiity: Barranca near Guadalajara, Jalisco. 
DistrIBuTIoNn: Rocky slopes, Jalisco to Puebla and Oaxaca. 
18. Iresine stricta Standley, Contr. U. S. Nat. Herb. 18: 97. 
1916. 
Erect shrub, 3-8 dm. high, sparsely branched, the branches suberect, slender or stout, 
striate, densely stellate-canescent; petioles stout, 2-6 mm. long; leaf-blades oblong-oval, 
ovate-oblong, broadly ovate, or ovate-rhombic, 1.3-3.5 cm. long, 0.5-1.5 em. wide, rounded 
or obtuse at the apex, obtuse or rounded at the base, subcoriaceous, stellate-canescent on the 
upper surface when young, glabrate in age, densely stellate-canescent beneath, subrugose, 
the veins coarse, prominent beneath, ascending; flowers dioecious, the panicle on a long naked 
peduncle 10-15 cm. long, narrow, the primary branches elongate and ascending or usually 
very short; spikelets elongate, slender, sessile, their rachises lanate; bracts and bractlets of the 
staminate flowers half as long as the sepals, broadly ovate, pilose, the sepals oblong, obtuse or 
acute, pilose, hyaline, dull-white; filaments equaling the sepals, the staminodia short, fimbriate 
at the apex; bracts and bractlets of the pistillate flowers equaling the sepals, pilose, the sepals 
ovate-lanceolate, 1.5 mm. long, acuminate, 3-nerved, white, densely long-pilose, the hairs 
exceeding the perianth, soft, white; stigmas elongate, filiform; seed 1 mm. long, reddishb- 
brown, shining. 
TypH Locatrry: Near Tehuacdn, Puebla. 
DIstRIBUTION: Dry, rocky soil, Oaxaca and Puebla. 
