CHENOPODIACEAE (gOOSBFOOT FAMILY) 163 



• Ua. Chenopodium rubrum humile (Hook.) Wats. Bot. Cal. 2: 48. 1880. 

 Smaller, prostrate or ascending: leaves ovate to lanceolate, often hastate, 

 much smaller, 1-3 cm. long, rarely toothed r flowers in axillary or somewhat 

 spicate clusters.^Colorado to Nevada and Washington; 



2. BLiTUM Tourn. 



Annual fleshy herbs, branched, often from the base. Leaves alternate, 

 hastate and petioled. Flowers small, crowded in axillar;^ capitate clusters or 

 the uppermost subspicate. Calyx more or less fleshy in fruit and Usually 

 highly colored. Stamens 1-5. Seed subglobose, vertical, shining; embryo a 

 complete ring. ^ ' 



.1. Blitum capitatum L. Sp. PI. 4. 1753. Glabrous, usually branched from 

 the base, the branches ascending, 2-5 dm. long: leaves from broadly triangu- 

 lar to lanceolate, usually sharply sinuate-toothed and more or less h?istate, 

 cordate at base, 2-7 cm. long: flower-clusters large, often 12 mm. in diameter, 

 becoming bright red and byitheir appearance suggesting berries:, seed com- 

 pressed, acuitely margined, sepai;able from the pericarp. Chenopodium cap- 

 itoium Wats. Bot. Cal„ 2: 48., 1880. (B. hastatum Rydb. Bull, torr.,' Bot. 

 Club 28: 273. 1901.) — ^Frequent; moist 'mountain valleys. 



3. MONOLEPIS Schrad. 



Low aimuals more or less branched, with alternate, entire, toothed, or lobed 

 leaves. Flowers polygamous; a single persistent sepal, 1 stamen and 2 styles. 

 The pericarp of the flat utricle thin and adherent to the vertical segd. 



1. Mondlepis NuttaUiana (R, & S.) Engelm. PI. Upp. Miss. 206. 1861. 

 More or leis mealy, branched from 'the base, 1-2 dm. high: leaves lanceolate- 

 hastate or sometimes narrowly spatulate, entire or sparingly sinuate-dentate, 

 cuneate or attenuate at base; lower petioles elongated: flower-clusters often 

 reddish: pericarp fleshy, becoming dry and minutely pitted; seed 1 mm. 

 broad, the margin acutish. M. chenopodioides Moq.^ — Mostly in saline' soil; 

 throughout our range and west to the coast. 



2. Monolepis pusilla Torr. in Wats. King's Rep. 5: 289. 1871. Somewhat 

 mealy and often tinged with red, slender and freely branched from the base, 

 5-S-15 cm. high: leaves oblong, obtuse; entire, scarcely petioled, 10-15 mm. 

 long: the small clusters 1-5-flowered: sepal obtuse: pericarp adherent and 

 minutely tuberculate; seed as in the preceding but only about one half as 

 large. — Rare in our range; alkali basins Colorado and westward. 



4. CORISPERMUM A. Juss. Bugseed 



Annuals, with alternate sessile : linear 1 -nerved leaves. Flowers perfect, 

 solitaiy in the axils of reduced leaves on the spica:te branches. Calyx reduced 

 to a single hyaline sepal, or none. Stamens 1-3 (rarely more), if more than 

 one unequal. The ovate ovary with 2 styles, becoming oblong in fruit. Per- 

 icarp adherent to the vertical acute-margined seed. 



Fruit distinctly wing-margined. 



Bushjr-branched throughout, floriferous above only . ,, . , 1, ,C. nitidum. 

 Divaricately branched below, floriferous nearlj^ to the base. 



the branches branched . . . . ' ^. , . . . 2. C. marginale. 

 The branches simple, spike-like , . J ",' . , , 3. C. imbricatum. 

 Fruit wingless or nearly so. 



Plant glabrous _ 4. C. emarginatum. 



Plant somewhat villous ■ 5. C. villosu^l. 



1. Corispermum nitidvun Kit. ex. Schult. Oestr. Fl. Ed. 2. 1: 7. 1814. 

 Rather pale' green, somewhat pubescent when young, slender-branched and 

 erect, 2-4 dm. high: leaves narrowly linear, 2-4 cm. long: spikes terminating 

 the slender branchlets, at first short and crowded, becoming longer and rather 



