Part 50 (1/2)

11. A. gracilis, Nutt. Subcinereous, slender (1 high or more); leaflets 11--17, linear, obtuse or retuse; racemes loose; flowers small (3”

long); _pods pendent_, 2--3” long, coriaceous, elliptic-ovate, _concave on the back_, the ventral suture prominent, _white-hairy_, at length glabrous, _transversely veined_.--Minn. to Neb. and Mo., and westward.

12. A. distortus, Torr. & Gray. Low, diffuse, many-stemmed, subglabrous; leaflets 17--25, oblong, emarginate; flowers in a short spike, pale-purple; pod ovate- or lance-oblong, curved, 6--9” long, glabrous, thick-coriaceous, somewhat grooved on the back, the ventral suture nearly flat.--Ill. to Iowa, Mo., Ark. and Tex.

13. A. lotiflrus, Hook. h.o.a.ry or cinereous with appressed hairs; stems very short; leaflets 7--13, lance-oblong; flowers yellowish, in few-flowered heads, with peduncles exceeding the leaves or very short; _calyx campanulate, the subulate teeth exceeding the tube_; pod oblong-ovate, 9--12” long, ac.u.minate, _acute at base_, canescent, the back more or less impressed, the acute ventral suture nearly straight.--Sask. to Neb. and Tex., west to the mountains.

14. A. Missouriensis, Nutt. Short-caulescent, h.o.a.ry with a closely appressed silky p.u.b.escence; leaflets 5--15, oblong, elliptic or obovate; flowers few, capitate or spicate, 5--8” long, violet; _calyx oblong, the teeth very slender_; pod oblong (1' long), acute, _obtuse at base_, p.u.b.escent, nearly straight, obcompressed or obcompressed-triangular, depressed on the back and the ventral suture more or less prominent, transversely rugulose.--Sask. to Neb. and N. Mex.

II. _Pod 1-celled, neither suture being inflexed or the ventral more intruded than the dorsal._--PHACA.

15. A. Coperi, Gray. Nearly smooth, erect (1--2 high); leaflets 11--21, elliptical or oblong, somewhat retuse, minutely h.o.a.ry beneath; flowers white, rather numerous in a short spike; calyx dark-p.u.b.escent; pod coriaceous, _inflated, ovate-globose_ (6--9” long), _acute, glabrous, slightly sulcate on both sides_, cavity webby.--Ont. and western N. Y. to Minn. and Iowa.

16. A. flexusus, Dougl. Ashy-p.u.b.erulent, ascending (1--2 high); leaflets 11--21, mostly narrow; flowers small, in loose racemes; pod thin-coriaceous, _cylindric_ (8--11” long, 2” broad), pointed, straight or curved, p.u.b.erulent, very shortly stipitate.--Red River Valley, Minn., to Col.

22. OXTROPIS, DC.

Keel tipped with a sharp projecting point or appendage; otherwise as in Astragalus. Pod often more or less 2-celled by the intrusion of the ventral suture.--Our species are low, nearly acaulescent perennials, with tufts of numerous very short stems from a hard and thick root or rootstock, covered with scaly adnate stipules; pinnate leaves of many leaflets; peduncles scape-like, bearing a head or short spike of flowers. (Name from ????, _sharp_, and t??p??, _keel_.)

[*] _Leaves simply pinnate._

1. O. campestris, DC., var. caerulea, Koch. _p.u.b.escent or smoothish_; leaflets lanceolate or oblong; flowers violet or blue, sometimes pure white; _pods_ ovate or oblong-lanceolate, of a _thin or papery_ texture.--N. Maine to Labrador.

2. O. Lamberti, Pursh. _Silky with fine appressed hairs_; leaflets mostly linear; flowers larger, purple, violet, or sometimes white; _pods cartilaginous or firm-coriaceous_ in texture, silky-p.u.b.escent, strictly erect, cylindraceous-lanceolate and long-pointed, almost 2-celled by intrusion of the ventral suture.--Dry plains, Sask. and Minn. to Mo. and Tex., west to the mountains.

[*][*] _Leaflets numerous, mostly in fascicles of 3 or 4 or more along the rhachis._

3. O. splendens, Dougl. Silvery silky-villous (6--12' high); scape spicately several to many-flowered; flowers erect-spreading; pod ovate, erect, 2-celled, hardly surpa.s.sing the very villous calyx.--Plains of Sask. and W. Minn., to N. Mex. and the Rocky Mts.

23. GLYCYRRHZA, Tourn. LIQUORICE.

Calyx with the two upper lobes shorter or partly united. Anther-cells confluent at the apex, the alternate ones smaller. Pod ovate or oblong-linear, compressed, often curved, clothed with rough glands or short p.r.i.c.kles, scarcely dehiscent, few-seeded. The flower, etc., otherwise as in Astragalus.--Long perennial root sweet (whence the name, from ??????, _sweet_, and ???a, _root_); herbage glandular-viscid; leaves odd-pinnate, with minute stipules; flowers in axillary spikes, white or bluish.

1. G. lepidta, Nutt. (WILD LIQUORICE.) Tall (2--3 high); leaflets 15--19, oblong-lanceolate, mucronate-pointed, sprinkled with little scales when young, and with corresponding dots when old; spikes peduncled, short; flowers whitish; pods oblong, beset with hooked p.r.i.c.kles, so as to resemble the fruit of Xanthium on a smaller scale.--Minn. to Iowa and Mo., and westward; Ft. Erie, Ont.

24. aeSCHYNoMENE, L. SENSITIVE JOINT-VETCH.

Calyx 2-lipped; the upper lip 2-, the lower 3-cleft. Standard roundish; keel boat-shaped. Stamens diadelphous in two sets of 5 each. Pod flattened, composed of several easily separable joints.--Leaves odd-pinnate with several pairs of leaflets, sometimes sensitive, as if shrinking from the touch (whence the name, from a?s???????, _being ashamed_.)

1. ae. hispida, Willd. Erect, rough-bristly annual; leaflets 37--51, linear; racemes few-flowered; flowers yellow, reddish externally; pod stalked, 6--10-jointed.--Along rivers, S. Penn. to Fla. and Miss. Aug.

25. CORONiLLA, L.

Calyx 5-toothed. Standard orbicular; keel incurved. Stamens diadelphous, 9 and 1. Pod terete or 4-angled, jointed; the joints oblong.--Glabrous herbs or shrubs, with pinnate leaves, and the flowers in umbels terminating axillary peduncles. (Diminutive of _corona_, a _crown_, alluding to the inflorescence.)

C. VaRIA, L. A perennial herb with ascending stems; leaves sessile; leaflets 15--25, oblong; flowers rose-color; pods coriaceous, 3--7-jointed, the 4 angled joints 3--4” long.--Conn. to N. J. (Nat.

from Eu.)