9 o 



BORAGINACEAE. 



VOL. III. 



13. ONOSMODIUM Michx. Fl. Bor. Am. i: 132. 1803. 



Perennial stout hispid or hirsute branching herbs, with alternate entire strongly veined 

 leaves, and rather small yellowish or greenish white proterogynous flowers, in terminal leafy- 

 bracted scorpioid spikes or racemes. Calyx deeply 5-parted, the segments narrow. Corolla 

 tubular or tubular-funnelform, 5-lobed, the lobes erect, the throat not appendaged, the sinuses 

 slightly inflexed, the tube with a glandular lo-lobed band within at the base. Stamens 5, 

 inserted on the tube or throat of the corolla, included; filaments short. Ovary 4-parted; 

 style filiform, exserted. Nutlets 4, or commonly only i or 2 perfecting, ovoid, sometimes 

 sparingly pitted, shining, smooth, white, attached by the base to the nearly flat receptacle, the 

 scar of attachment small, flat. [Greek, like onosma, or ass-smell.] 



About 10 species, natives of North America and Mexico. Besides the following, 3 others occur 

 in the southern and southwestern United States. Type species: Onosmodium hispidum Michx. 



Corolla-lobes 2-3 times as long as wide. 

 Corolla-lobes scarcely longer than wide. 

 Stem glabrous below. 

 Stem hirsute or pubescent to the base. 



Pubescence silky ; nutlets distinctly pitted. 

 Pubescence hirsute to strigose ; nutlets indistinctly pitted. 

 Nutlets not constricted. 

 Nutlets distinctly constricted just above the base. 



1. O. virginianum. 



2. O. subsetosum. 



3. O. molle. 



4. O. occidentale. 



5. O. hispidissimum. 



i. Onosmodium virginianum (L.) DC. Vir- 

 ginia False Cromwell. Fig. 3542. 



Lithospermum virginianum L. Sp. PI. 132. 1753. 

 Onosmodium virginianum DC. Prodr. 10 : 70. 1846. 



Densely appressed-hispid or strigose, with stiff 

 hairs ; stem rather slender, usually branched above, 

 i-2i high. Leaves oblong, oval, or oblong-lanceo- 

 late, obtuse or acutish, sessile, i'-3i' long, or the 

 lower oblanceolate and narrowed into petioles ; calyx- 

 segments linear-lanceolate, acuminate; corolla cylin- 

 dric or nearly so, yellowish-white, about 4" long, 

 the lobes narrowly lanceolate, acuminate, 2 or 3 times 

 as long as wide, nearly as long as the tube, strigose 

 without; nutlets ovoid, obtuse or obtusish, pitted, 

 i"-ii" long. 



In dry thickets or on hillsides, Massachusetts to Penn- 

 sylvania, Florida and Louisiana. Ascends to 3000 ft. in 

 Virginia. Wild job's-tears. May-July. 



2. Onosmodium subsetosum Mack. & Bush. 

 Ozark False Cromwell. Fig. 3543- 



O. subsetosum Mack. & Bush; Small, Fl. SE. U. S. 1001. 

 1903. 



Stem erect, glabrous, or with a few scattered ap- 

 pressed hairs above, somewhat branched, 3 high ot 

 less, the branches appressed-pubescent. Leaves lanceo- 

 late, acute, papillose and appressed-hispid above, whitish 

 appressed-pubescent beneath, the larger about 3^' long; 

 bracts i'-i' long; calyx-lobes oblong, obtuse, 3" long; 

 corolla about 5" long, canescent, its lobes triangular, 

 acute, about i" long; fruiting pedicels 2"-3" long; nut- 

 lets whitish, ovoid, ii" long, obtuse or acutish, not con- 

 stricted, sparingly pitted. 



Barrens, Ozark Mountains, Missouri and Arkansas. 

 June- Aug. 



