Hil CHENOPODJACEAE (GOOSEFOOT FAMILY) 



lax in fruit: utricle narrowly but clearly winged, about 2 mm. broad and 

 usually broader than the subtending leaf or bract. C. hyssopifolium. 



mhout the middle west. 



J. Corispermum marginale Rydb. Bull. Torr. Bot. Club 30: 247. 1903. 



Annual; stem glabrous, much branched, 2-5 dm. high: leaves narrowly linear, 



5 '-' mm. wide: spike 3-8 cm. long, rather dense: bracts usually 



overlapping each other, the lower lanceolate, about 1 cm. long, the upper 



5 mm. long, all more or less acuminate, with a strong midrib and con- 



spicuous soar-ions margins, slightly pubescent when young or glabrate: fruit 



about 4 mm. long and 2.5 mm. wide, with a broad wing-margin. Wyoming to 



Mexico. 



3. Corispermum imbricatum A. Nels. Very glabrous throughout; branches 

 spreading from the crown of the annual root, 1-2 dm. long, simple, spike-like 

 and floriferous nearly to the base: leaves crowded-imbricate, lanceolate to 

 ovate, 7-15 mm. long, broadly scarious-margined : fruit oval, about 3 mm. 

 long, narrow wing-like margin, yellowish. Characters much like the preceding 

 but of very different habit. Southeastern Wyoming. 



4. Corispermum emarginatum Rydb. Bull. Torr. Bot. Club 31: 404. 1904. 

 Annual, perfectly glabrous or with a few hairs on the bracts, branched near 

 the base, 3-4 dm. high: leaves narrowly linear, 2-4 cm. long, 1-2 mm. wide, 

 cuspidate-pointed: bracts except the lowest ovate, 5-7 mm. long, acuminate, 

 scarious-margined, much broader than the fruit: fruit plano-convex, 2.5-3 mm. 

 long and about 2 mm. wide, almost without a trace of a wing-margin. Wy- 

 oming and Colorado. 



5. Corispermum villosum Rydb. Bull. Torr. Bot. Club 24: 191. 1897. 

 Stem 2-4 dm. high, much branched from near the base, the branches diver- 

 gent, striate, when young with the leaves and bracts villous with many 

 branched hairs, in age glabrate: leaves linear, 2-4 cm. long, 1-3 mm. wide 

 cuspidate-mucronate: spikes rather dense, with more or less imbricated bracts 

 lower bracts linear-lanceolate, 5-10 cm. long, the upper ovate-acuminate am 

 cuspidate, 4-5 mm. long and about 3 mm. wide, with broad scarious margin 

 achene 2-2.5 mm. long and 2 mm. wide, acutely margined but scarcely at a 

 winged. Throughout our range. 



5. CYCLOLOMA Moq. 



An erect herbaceous annual with thin leaves and small flowers in inter 

 rupted panicled spikes. Flowers perfect or pistillate; the urn-shaped calyx 

 with 5 concave acute carinate lobes, around the base of which develops a mem 

 branous wing. Stamens 5. Styles 3. Seed lenticular. 



1. Cycloloma atriplicifolium (Spreng.) Coult. Mem. Torr. Club 5: 143 

 ls.ii. More or less arachnoid-pubescent, becoming glabrate, diffusel 

 branched, 1 -3 dm. high, generally light green or purple-tinged: leaves lanceo 

 late, acute, coarsely sinuate-toothed, on slender petioles: calyx cleft to th 

 middle, 4 mm. broad, including the irregular wing, wholly covering th 

 utricle. ( '. platyphyllum Moq. Throughout our range in sandy soil; not com 

 mon. 



6. KOCHIA Roth 



plants from a shrubby base, with terete leaves. Flowers solitary o 

 fe\v in the axils, with globose, transversely winged perianth, 5 usually exsertec 

 a depressed ovary, and 2 filiform styles. The pericarp membranous 



''..iturity ..... 1. K. americana 



vittoiM or ubtomenioM ......... 2. K. vestita. 



I Kochia americana Wats. Proc. Am. Acad. 9: 93. 1874. Branching a 



base; stems villm< tomentose or nearlv glabrous: flowers 1-3 in the axils 



with abortive stamens: perianth densely \\hite-tomentose, persistent 



. ing cuneate-rounded, nerved and somewhat crenu 



