740 \'ERBEXACE.\E 



blue; nutlets smooth. River vallevs, thickets and waste places: N.S. — Fla. — 

 N.M.— CaUf.— B.C. PlainSubmont. My-Au. 



V. hastata X stxicta. In habit resembling V^ hastata, but the leaves more veiny- 

 reticulate and softer pubescent and the corolla larger. Mo. — Colo. 



2. V. stricta Vent. Perennial; stem stout, 3-12 dm. high, simple or branched 

 above, densely pilose, almost velutinous, terete or nearly so; leaf -blades oblong, 

 oval, 3-10 cm. long, doubly serrate or incised, rugose, nearly sessile, densely 

 soft -pubescent ; spike stout, strict; calyx hirsute, 5 mm. long; corolla dark blue; 

 nutlets strongh' reticulate. Dn.' soils, pastures, and river valleys: Minn. — -Ky. 

 — Tex. — X.^1. — Wash.; introduced eastward to Conn. Je-Au. 



3. V. MacDougalii Heller. Perennial; stem stout, simple, obtusely 4- 

 angled, 3-7 dm. high, densely pilose; leaf -blades oblong-lanceolate, densely soft- 

 pubescent, short-petioled, thick, rugose and reticulate beneath, incised-serrate, 

 7-9 cm. long; spikes often sohtan.- or few, stout, dense; corolla blue; limb 4 mm. 

 broad; nutlets striate, with a few cross-reticulations above. River valleys: X.M. 

 — Colo. — Ariz. Plain — Submont. Jl-Au. 



4. V. bracteosa Michx. Annual or perennial; stem branched at the base, 

 prostrate or procumbent, 1-5 dm. long, diffusely branched, angled, more or less 

 hirsute; leaf-blades spatulate in outline, pinnately lobed and incised or doubly- 

 toothed, 1-6 cm. long, prominently veined beneath, liirsute; bracts lanceolate or 

 linear-lanceolate; calyx bristly, 3 mm. long; corolla purple or bluish; limb 2 mm. 

 broad; nutlets strongly reticiilate on the back. V. rudis Greene. Waste places, 

 prairies and plains: ^lan. — 111. — Fla. — Tex. — Calif. — B.C. Plain — Submont. 



V. bracteosa X hastata. ResembUng most V. bracteosa in habit, but stouter, more 

 erect, -srith broad, laciniate rather than dissected leaves and shorter bracts. Xeb. — Colo. 



V. bracteosa X stricta. Resembling V. bracteosa in habit, but stout«r, with broad, 

 laciniate, strongly reticulate leaves and larger flowers. Mo. — Kans. — Xeb. 



5. V. remota Benth. Annual or perennial; stem mostly erect, sparingly 

 branched, 2— i dm. high, round-angled, hirsute; leaf -blades obovate in outline, 

 mostly bipinnatifid, with lanceolate di\-isions, 2-8 cm. long, hirsute; bracts hnear 

 or linear-subulate; cah^x 2-2.5 mm. long, hirsute; teeth subulate, short; corolla 

 lilac, 4-5 mm. long; nutlets reticulate on the back. Plains and waste places: 

 Utah — c Mex. Son. Ap-X. 



6. V. ciliata Benth. Perennial; stem branched at the base, 0.5-2 dm. high, 

 decumbent, hirsute, leafy; leaf-blades 2-4 cm. long, obovate in outline; calj'x 

 becoming 7-8 mm. long; corolla 1-1.5 cm. long; limb 7-8 mm. wide; nutlets 

 strongly wrinkled. Drj- plains and hills: Tex. — Colo. — Ariz.; Mex. Son. — 

 Sitbmont. Ap-Au. 



7. V. Gooddingii Briq. Perennial; stem 2-5 dm. high, robust, liirsute, 

 branched; leaves spatulate or obovate in outhne, densely hirsute; spikes very 

 short; bracts lanceolate, acimiinate, shorter than the cahoc; corolla 12-15 mm. long; 

 limb S mm. broad. Sandy bottom lands: X"ev. — s Utah — Ariz. Son. Mr-My. 



8. V. ambrosifolia Rydb. Perennial; stem branched and decimibent at 

 the base, sparingly hirsute, 2—1 dm. long; leaf -blades obovate in outline, bipinna- 

 tifid or biternately divided, with oblanceolate divisions, sparingly hirsute; calyx 

 becoming 8-9 nma. long; coroUa-limb 6-8 mm. wide; nutlets coarsely wrinkled 

 aU over the back. Plains and stony soil: S.D. — Tex. — Ariz. Son. — Plain — 

 Submont. Je-Au. 



9. V. bipiiinatifida Nutt. Perennial; stems often branched at the base, 

 1-4 dm. high, decumbent at the base; leaf-blades 2-5 cm. long, bipinnatifid; 

 segments linear; caljoc becoming 9-10 mm. long; corolla-hmb 7-9 mm. wide; 

 nutlets 3 mm,, long, prominently wTinkled above. Plains and dry groimd: 

 S.D. — La. — Tex. Son. — Plain. ^ly-Jl. 



2. PHYLA Lour. 



Perennial, caulescent, prostrate or creeping herbs. Leaves opposite, peti- 

 oled, toothed or lobed. Flowers perfect, in dense, sometimes head-like, ped- 

 uncled axillary spikes, conspicuously bracted. Calyx-tube flattened and 2- 



