2 A. glabra Desf. Nearly glabrous, shrubby; lfts. oblong or elliptical, dotted, petiolulate, the lowest pair close to the stem; fls. subsessile; cal. teeth short, the 2 upper obtuse, the 3 lower longer, or nearly equal, villous; sty. hairy towards the base. - Near Wilmington and Newbern, N. Car. Plant 4 to 5f high. Fls. dark blue. Jl. (v. s. in herb. Curtis.) (A. Caroliniana Croom).
3 A. herbacea Walt. Pubescent and somewhat hoary, shrubby; lfts. 20 to 25 pairs, oblong, obtuse, dotted, the lowest pair close to the stem; fls. subsessile; teeth of the cal. nearly equal, short; cor, whitish. - Pine woods, N. Car. to Fla. Plant 2 to 4f high, grayish. Lvs. 5 to 7 long; lfts. 6 to 8" by 3". Petiolules 1" long. Spikes many, clustered at top, very downy, 6 to 8' long. Jn., Jl.
4 A. canescens Nutt. Suffruticous, and canescently villous, lfts. small, numerous, crowded, ovate-elliptical, subsessile, mucronate; spikes aggregate; fls. subsessile; calyx teeth equal, oval acute; vex. bright blue; leg. 1-seeded. - A beautiful species, 2 to 4f high, in dry, sandy soils, Wis to La. and R. Mts., and is supposed to prefer localities of lead ore. Lvs. 2 to 3' long; lfts. coriaceous, 16 to 24 pairs, obtuse at base, 4 to 6" by 1 to 2". Spikes 2 to 3' long. Jl., Aug.
36. DA'LEA, L. (In honor of Thomas Dale, an English botanist.) Calyx subequally cleft or toothed; petals unguiculate, claws of the wings and keel adnate to the staminate tube half way up; vexillum free, the limb cordate; stamens 10, united into a cleft tube; ovary 2-ovuled; legume inclosed in the calyx, indehiscent, 1-seeded. - Mostly herbaceous and glandular-punctate. Lvs. odd-pinnate. Stipels 0, stip. minute, setaceous. Spikes mostly dense.
D. alopecuroides Willd. Glabrous and much branched; lfts. 8 to 14 pair?, linear-oval, obtuse or retuse, punctate beneath; spike pedunculate, oblong-cylin-dric, terminal, silky-villous; bracts about equaling the acuminate segments of the cal. - Prairies and bottoms, Ill., Mo., Car. Plant about 2f high, bushy and leafy and pale green. Lfts. not more than 4" by 1", sessile, and nearly in mutual contact. Spikes 1 to 2' long. Vexillum white, wings and keel pale violet. (D. Linnaei Mx. Petalostemon Ph.)
37. PETALOSTE'MON, Mx. (Alluding to the union of the petals and stamens.) Calyx 5-toothcd, nearly equal; petals 5, on filiform claws, 4 of them nearly equal, alternate with the stamens and united with the staminate tube; stamens 5, monadelphous, tube cleft; legume 1-seeded, indehiscent, included in the calyx. - Mostly . Lvs. unequally pinnate, exstipellate. Fls. in dense, pedunculate, terminal spikes or heads.
§ Petalostemon proper. Calyx teeth short. Heads not involucrate. Bracts small (a).
a Bracts aristate-pointed, longer than the calyx................
Nos. 1, 2
a Bracts obuse or acute, not aristate, short....................
Nos. 3, 4
§ Kuhnistera, Lam. Calyx teeth very long, setaceous, plumous, pappus-like. Hds.
involucrate, with broad, scale-like bracts.....................................
1 P. candidum Mx. Glabrous, erect; lfts. 7 to 9, all sessile, linear-lanceolate, mucronate, glandular beneath; spikes on long peduncles; bracts setaceous, longer than the white petals; vex. broadly cordate, the other pets. ovate. - A fine-looking plant in dry prairies, S. and W. States. St. 2 to 4f high, sparingly branched, slender. Lfts. 9 to 18" by 3 to 5", terminal one largest. Fls. small, white, crowded in dense spikes which are 1 to 3' long. Jl.
2 P. violaceum Mx. Minutely pubescent, erect; lfts. 5, linear, glandular beneath; spikes pedunculate, oblong or oval bracts shorter than the violet petals; vox. cordate, the other petals oblong, obtuse at base. - A beautiful plant, of similar habits with the last. St. slender, striate, subsimple, 1 1/2 to 2f high. Lfts. about 1' by 1", all sessile. Spikes 1 to 8, very dense, 1/2 to 1 1/2 long. Petals of a bright violet-purple. Jl., Aug.
3 P. carneum Mi, Glabrous, erect; lfts. 5 to 7, lance-linear; spikes oblong, pedunculate; bracts obovate, somewhat exceeding the short teeth of the glabrous calyx; pet. oblong, narrowed at base in the long claws. - Ga. and Fla. Slender, branching. 1 to 2f high; lvs. fascicled in the axils. Lfts. acute, 5 to 8" long. Spikes 1' long. Fls. roseate or white. Aug.
4 P. gracile Nutt. Glabrous, decumbent at base; lfts. 7, lance-linear; spikes oblong or cylindrical, somewhat sessile; bracts acute, about equaling the short, blunt calyx teeth; petals ovate; vex. broadly cordate.- W. Fla. and Ala. nearly simple, 1 to 2f long, leafy to near the top. Lfts. 3 to 6" long. Spikes 6 to 12' long. Fls. white.
5 P. corymbosum Mx. St. corymbously branched; spikes capitate, sessile; bracts broad, colored, the outer leaf-bearing and flowerless; lfts. linear, 5 to 7.- A singularly elegant plant of the pine barrens, N. Car. to Fla. Sts. 1 to 2f high, many from one root, each with a corymb at summit. Heads resemble the Compositae, with red scales and white lance-oblong petals. Sept., Oct.
38. ASTRAG'ALUS, L. Milk Vetch. Calyx 5-toothcd; keel of the corolla obtuse; stamens diadelphous (9 and 1); legumes 2-celled by the introflexion of the lower suture. - Herbaceous or suffruticous, with unequally pinnate lvs., and the fls. in spikes or racemes.
§ Legumes straight, eylindric. Flowers ochrolencous...................................
§ Legumes curved, prismatic. Fls. whitish or bluish........................
Nos. 2 - 4
§ Leagumes globular, fleshy. Fls. whitish or blue......................
1 A. Canadensis L. Canescent, erect, diffuse; stip. broad-lanceolate, acuminate; lfts. about 10 pairs, elliptical, obtuse at both ends; the lowest ovate, obtuse; ped. about as long as the lvs., when in fruit shorter; bracts subulate, as long as the cal.; fls. somewhat reflexed; leg. ovate-oblong, terete, suberect, smooth, many-seeded, abrupt at the end and tipped with the permanent style.-
River banks, etc., Can. and U. S. St. bushy, about 3f high, very leafy. Fls. greenish-yellow, in dense spikes. Pods V in length, leathery. Jl. Aug.
2 A. glaber Mx. Nearly glabrous, erect; stip. minute or 0; lfts. 8 to 11 pairs, oblong-lanceolate or linear, obtuse or emarginata; spikes loose, much longer than the lvs.; bracts subulate, scarcely longer than the pedicels; leg. flattened, reticulated.- Pino barrens, N. Car. to Fla. St. 1 to 2f high. Fls. greenish white. Pods distant, 1 1/2' long, spreading, incurved, acute at each end. Apr.