BORAGINACEAE (BORAGE FAMILY) 



687 



875. O. virginianuin. 



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

 Apr. -July. 



11. ONOSM6DIUM Michx. FALSE GROMWELL 



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, 

 not conspicuously constricted at base. Dry banks, 

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



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



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

 ++ Silky-pubescent; 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. 



w -M. 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. (0. 

 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 un constricted 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 8TC o hispidissimum 

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

 N. Y. and s. Ont. to Neb., and south w. FIG. 876. Var. MACROSPERMUM 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, finelv 



