244 CHENOPODIACEAE 



utricle. C. platyphyllum (Michx.) Moq. Sandy soil: Ont. Ark. 'Tex. N.M. 

 Ariz. Mont. L. Son. Plain Submont. Je-S. 



5. KOCHIA Roth. 



Perennial or annual herbs, or undershrubs, with alternate narrow leaves. 

 Flowers solitary or few together in the upper axils, perfect or pistillate, some- 

 times bracteolate. Calyx herbaceous, 5-eleft, persistent, at length developing 

 a horizontal wing. Stamens 3-5, usually exserted; filaments linear. Ovary 

 ovoid, narrowed upwards; stigmas 2. Pericarp not adherent to the inverted 

 seed. Endosperm scanty. 



Perennial undershrubs; leaves linear-filiform, fleshy. 



Branches tomentulose, soon glabrate; leaves somewhat hairy when young; fruit 

 nearly glabrous. 1. K. americana. 



Branches and leaves densely and permanently hairy; fruit very pubescent. 



2. K. vestita. 

 Annual; leaves lanceolate, not fleshy. 3. K. scoparia. 



1. K. americana S. Wats. Low undershrub; stems 1-4 dm. high; leaves 

 6-25 mm. long, acute, ascending, puberulent or glabrate; ovary ovate, tomentose 

 at the apex, shorter than the calyx and styles. Foot-hills and alkaline flats: 

 Wyo. Colo. N.M. Calif. Plain Submont. Je-S. 



2. K. vestita S. Wats. Low undershrub; stems 1-4 dm. high; leaves 6-20 

 mm. long, villous, nearly erect, acute; ovary oblong, nearly equalling the calyx. 

 Foot-hills and alkaline flats: Wyo. Colo. Calif. Ore. Plain Submont. My- 

 Jl. 



3. K. scoparia (L.) Schrad. Branches annual; stems sparingly pubescent 

 or glabrous, 3-10 dm. high; branches strongly ascending; leaves lanceolate, or 

 the upper linear, the lower 3-nerved, entire; flowering branches and calyces vil- 

 lous. Waste places and fields: Vt. Pa. Colo.; adv. from the Old World. 

 Plain. Jl-S. 



6. CORISPERMUM (A. Juss.) L. BUG-SEED. 



Caulescent annuals, with narrow sessile leaves and diffusely branched stems. 

 Flowers solitary, in the axils of more or less leaf-like bracts. Sepals 1-3, unequal, 

 scarious. Stamens 1-3, rarely 5, hypogynous, one longer than the rest; filaments 

 dilated. Ovary 1 -celled; styles 2. Utricle more or less flattened, in ours acutely 

 margined or winged. Pericarp adherent to the vertical seed. Endosperm fleshy. 



Fruit with a distinct wing, about 0.5 mm. wide. 



Spike lax ; lower bracts much narrower than the fruit. 1 . C. nitidum. 



Spikes dense; lower bracts usually overtopping, and rarely narrower than the fruit. 



2. C. marginale. 

 Fruit merely acute-margined, scarcely at all winged. 



Plant glabrous. 3. C. emarginatum. 



Plant more or less villous. 4. C. villosum. 



1. C. nitidum Kit. Stem branched, 3-6 dm. high, glabrous; leaves linear- 

 filiform, 2-5 cm. long, 1 mm. wide or less; lower bracts subulate, about 1 cm. 

 long, 1-1.5 mm. broad at the base; the upper lanceolate, shorter; fruit about 

 2 mm. broad and 3 mm. long. C. hyssopifolium microcarpum S. Wats. On 

 sand-hills and in canons: 111. Tex. N.M. N.D.; Eurasia. Son. Plain 

 Submont. Jl-S. 



2. C. marginale Rydb. Stem glabrous, much branched, 2-5 dm. high; 

 leaves narrowly linear, 2-5 cm. long, 1.5-2 mm. wide; lower bracts lanceolate, 

 about 1 cm. long ; the upper ovate, 5 mm. long, all with conspicuous scarious 

 margins; fruit about 4 mm. long and 2.5 mm. wide. C. imbricatum A. Nels. 

 Sandy soil: Wyo. N.M. Plain Submont. Au-O. 



3. C. emarginatum Rydb. Stem 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; fruit 

 2.5-3 mm. long and about 2 mm. wide. Sandy valleys: Alta. Colo. Nev. 

 Submont. 



