364 
* Flowers diwcious: leaves petioled. 
1. I. celosioides Moq. Nearly glabrous annual, erect, slender, 6 to 12 dm. high: 
leaves ovate-lanceolate: flowers sometimes polygamous, minute: panicles very 
slender, or often broad and diffuse, naked: bracts and calyx silvery-white, the fertile 
calyx twice longer than the broad bracts and densely silky-villous at base.—From 
the Ohio to Kansas and Texas, Var. OBTUSIFOLIA is lower; leaves much smaller, 
blunt, more scabrous (especially beneath on the prominent white veins), ovate or 
very broadly spatulate: panicle dense, narrow, leafy: spikes longer ; flowers larger.— 
From western ‘l'exas to the State of Chihuahua. 
2, I. diffusa Humb. & Bonp. Stems erect, 6 to 9 dm. high, smooth, somewhat 
5-angled: leaves ovate, 4 to5 cm. long, acuminate: the upper lanceolate, slightly den- 
ticulate-ciliate on the margin, smooth: panicle loose, narrowly pyramidal, much 
branched: spikes ovate, obtuse, straw-colored: sepals smooth, twice as long as the 
ovate bracts.—Near the Great Canon of the Rio Grande. . 
* * Flowers perfect: leaves sessile. 
8. L:vermicularis Moy. Smooth: stem prostrate or creeping, much branched, 3 
to 6 dm. long: leaves club-shaped, fleshy, semiterete, 1.5 to 2.5 cm. long: heads 
mostly sessile, ovate or globose, at length oblong or cylindrical, obtuse: flowers 
white: sepals obtuse, longer than the bracts, the two exterior ones woolly at base.— 
Alluvial soils of the Lower Rio Grande, October. 
12. DICRAURUS Hook. f. 
Branching whitish-pubescent shrub, with small sparse alternate 
leaves, small dicecious bracted flowers (immersed in long wool) in 
terminal branching panicles, oblong or rounded scarious shining bracts, 
5-parted calyx with linear-oblong obtuse segments, 5 filaments united 
at base and but 2 bearing anthers, 2 sessile subulate recurved stigmas, 
and a broadly ovoid indehiscent utricle. 
1. D. leptocladus Hook. f. Leaves ovate or ovate-lanceolate, 12 to 25 mm. long, 
acute, very entire, sericeous beneath, tapering to a short petiole, (Jresine diffusa 
Torr. Bot. Emory Exped., not Humb. & Bonp. Jresine alternifolia, var. Terana 
Coulter, Contr. Nat. Herb. i, 48.)—Western Texas (Chenate Mountains) and north- 
ern Mexico. 
CHENOPODIACER. (GoosEFOOT FAMILY.) 
Chiefly herbs of homely aspect, more or less succwent, with mostly 
alternate leaves and no stipules or scarious bracts, minute greenish 
flowers with a free persistent calyx, stamens as many as the calyx- 
lobes and inserted opposite (or on the base), 2 (rarely 3 to 5) styles or 
stigmas, and al-celled ovary becoming a 1-seeded thin utricle or rarely 
an achene. 
* Saline herbs or shrubs with fleshy linear leaves and stems not jointed: embryo 
flat-spiral. 
1. Sarcobatus. Flowers moniecious or dimwcious, bractless: fruit transversely 
winged: seed-coat membranaceous. 
2, Sueda. Flowers perfect, axillary, with small bractlets: seed-coat crustaceous. 
