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-funnel form, 5-lobed, the lobes erect, the throat not appendaged, the sinuses slightly inflexed, the tube with a glandular 10-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 1 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.

1. O. virginianum.

Corolla-lobes scarcely longer than wide. Stem glabrous below.

2. O. subsetosum.

Stem hirsute or pubescent to the base.

Pubescence silky; nutlets distinctly pitted.

3. O. molle.

Pubescence hirsute to strigose; nutlets indistinctly pitted. Nutlets not constricted.

4. O. occidentale.

Nutlets distinctly constricted just above the base.

5. O. hispidissimum.

13 Onosmodium Michx Fl Bor Am 1 132 1803 213

1. Onosmodium Virginianum (L.) Dc. Virginia False Gromwell

Fig. 3542

Lithospermum virginianum L. Sp. Pl. 132. 1753. Onosmodium virginianum DC. Prodr. 10: 70. 1846.

Densely appressed-hispid or strigose, with stiff hairs; stem rather slender, usually branched above, 1°-2 1/2° high. Leaves oblong, oval, or oblong-lanceolate, obtuse or acutish, sessile, 1'-3 1/2' 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, 1"- 1/2" long.

In dry thickets or on hillsides, Massachusetts to Pennsylvania, Florida and Louisiana. Ascends to 3000 ft. in Virginia. Wild job's-tears. May-July.

2. Onosmodium Subsetosum Mack. & Bush. Ozark False Gromwell

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, 30 high or less, the branches appressed-pubescent. Leaves lanceolate, acute, papillose and appressed-hispid above, whitish appressed-pubescent beneath, the larger about 3 1/2' long; bracts 1/2'-1' long; calyx-lobes oblong, obtuse, 3" long; corolla about 5" long, canescent, its lobes triangular, acute, about 1" long; fruiting pedicels 2"-3" long; nutlets whitish, ovoid, 1 1/2" long, obtuse or acutish, not constricted, sparingly pitted.

Barrens, Ozark Mountains, Missouri and Arkansas. June-Aug.

2 Onosmodium Subsetosum Mack Bush Ozark False Grom 214