244 CHENOPODIACEAE 



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

 — Ariz. — Mont. L. Son. — -Plain — •Submont, Je-S. 



5. K6CHIA Roth. 



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

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

 times bracteolate. Calyx herbaceous, 5-cleft, 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 Unear-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— Suhmont. Je-S. 



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



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



Foot-hills and alkaline flats: Wyo.— Colo —-Calif. — Ore. Plain— Siihmoni, 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- 

 loiis. Waste places and fields: Vt. — Pa.— Colo.; adv. from the Old \\V)rld. 

 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, hypog^^nous, one longer than the rest; filaments 

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

 margmed or wmged. 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. 



-n, -^ , ^ . , 2. C. marginale. 



Fruit merely acute-margined, scarcely at all winged. 



Plant glabrous 3, c, emarginatunu 



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



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



fihform, 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 microcarpmn S. Wats. On 



sand-lulls and m canons: 111.— Tex.— N.M.— N.D.; Eurasia. Son.— Plain— 

 Suhviont, Jl-S. 



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



leaves narrowly Imear, 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 

 margms; fruit about 4 mm. long and 2.5 mm. wide. C. imhricalum A. Nels. 

 Sandy soil: Wyo.— N.M, Plain— SuhmonL Au-0. 



3. C. emarginatmn Rydb. Stem branched near the base, 3-4 dm. high; 



leaves narrowly Imear, 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, 



