BORAGINACEAE (BORAGE FAMILY) 



687 



and sterile or sandy soil, s. Ont., Ind., and Mich, to N. Dak., Tex., and westw. 

 Apr. -July. 



11. ONOSM6DIUM Michx. FALSE GKOMWELL 



Divisions of calyx linear and erect. Corolla tubular, or tubular-funnel-form 

 (the sinuses minutely hooded-inflexed) , the 5 acute lobes converging or barely 

 spreading. Anthers oblong-linear or arrow-shaped, 

 mucronate, inserted in the throat. Style thread- 

 form, much exserted. Nutlets bony, ovoid, erect; 

 the scar not hollowed out. Chiefly perennial herbs, 

 coarse and hispid, with oblong and sessile rib-veined 

 leaves, and white, greenish, or yellowish flowers in 

 at length elongated and erect leafy raceme-like 

 clusters ; fl. in summer. (Named from a likeness to 

 the genus Onosma, meaning ass-smell.) 



* Corolla-lobes lance-subulate, 2-3 times as long as 

 wide. 



1. 0. virginianum (L.) A. DC. Clothed with harsh 

 and rigid appressed short bristles; stems rather 

 slender, 3-8 dm. high ; leaves narrowly oblong or 

 oblong-lanceolate, 3-9 cm. long, the lower narrowed 

 at base ; nutlets 2-2.8 mm. long, irregularly pitted, 



875 O vinrfiii-inuiu not conspicuously constricted at base. Dry banks, 



sandy hillsides, etc., Mass, to Fla. and La. FIG. 875. 

 * * Corolla-lobes deltoid, scarcely longer than broad. 

 i- Stem hispid, villous, or hirsute to the base. 

 *+ Silky -pube scent ; nutlets conspicuously pitted. 

 2. 0. m611e Michx. Finely grayish-pubescent ; the lowest leaves oblanceo- 

 late, the others ovate to ovate-lanceolate, conspicuously veined, acutish ; calyx 

 silky as well as sparingly hirsute ; nutlets 3 mm. long, pitted, sometimes slightly 

 constricted at the base. ( 0. carolinianum, var. Gray, in part.) Old fields and 

 cedar barrens, Ky. and Tenn. 



*+ ++ Strigose to hirsute ; nutlets scarcely or not at all pitted. 



3. 0. occidentale Mackenzie. Stoutish and somewhat rigid, 4-6 dm. high, 

 rather finely but copiously grayish-pubescent ; leaves lanceolate to narrowly 

 lance-ovate, strongly rib-veined, 4-8 cm. long, 1-1.8 cm. 



wide, with pubescence mostly appressed or subappressed ; 

 nutlets rounded and not at all constricted at the base. ( O. 

 carolinianum, var. molle Gray, in part.) Alluvial soil, 

 sandy or gravelly banks, etc., 111. to Sask., Col., and N. Mex. 

 Var. SYLVESTRE Mackenzie. Taller, 1 m. or more high, less 

 canescent and more shaggy -hirsute in the manner of the 

 next species, but with nutlets unconstricted at the base. 

 111. and Mo. 



4. 0. hispidissimum Mackenzie. Stout, erect, 10-12 dm. 

 high, green, coarsely hirsute throughout ; stem-leaves ovate, 

 8-10 cm. long, 1.8-4 cm. wide, the pubescence mostly spread- 

 ing ; nutlets about 3 mm. long, with a very short neck or 



constriction at the base, brownish tinged. (O. carolinianum 876 o hispidissimum 

 Man. ed. 6, not DC.) Kiver-banks, rich bottoms, etc., 

 N. Y. and s. Ont. to Neb., and southw. FIG. 876. Var. MACROSPERMTTM Mac- 

 kenzie & Bush, with larger and more shining white nutlets nearly 4 mm. long, 

 is distinguishable in 111. and Mo. 



- H- Stem essentially smooth and glabrous below. 



5. 0. subsetbsum Mackenzie & Bush. Stem erect, nearly or quite glabrous 

 to the middle, 6 dm. or more in height ; leaves narrowly lanceolate, finely 





