APPEI^DIX. 
435 
lets 3-.^, obovate or oblong, scattered on the winged rachis. Small procumbent or depressed 
annuals. 
27. H. SUBPINNATA, T. & G. Villous-hlrsuto or glabrate. See page 62. 
28. H. BRACHYCARPA, Benth. Softly long- villous, much branched from the base ; flowers larger ; 
calyx-teeth very much exceeding the tube and equaling or half as long as the oblong or linear-oMoug 
very obtuse villous 2-4-seeded legume. — California. 
ASTRAGALUS. 
With the following very closely allied genus Oxytropis, mainly as revised by Dr. GJ^AV, J'nu . J//« 
Acad., Vol. VI, pp. 188-234, (1863,) with the addition of tlie newer species. The grouping is retained as 
far as possible, though not always very satisfactory. Tlio order is from the perfectly 2-celled species, 
through the imperfectly 2-celled, to those with strictly 1-celled li gniiics. 
Series I. ASTRAGALUS, L. Pod completely or imporfcelly ^-'-'■"■llrrl l>.v ihv iulnision of ili.- dnisn) 
suture, the ventral suture being not at all or less (1< t ply inllrxcd. vvS 1-1(1. 
^ 1. SAECOCARPI. Pod plum-shaped, succulent, becoming thick and lK',sIi,\ , imlchisi en!, in'i sHj)! 
tate, septum comidoto. Perennials, with low leafy stems ; stipules distiiicl, iieni ly Jicc; i.u rjncs 
short, spike-like. . 
* Ovajy and pod glabrous. 
1. A. CARYOCARPUS, Ker. Grayish witli nu a])pro.sscd pubcscenri- ; llowi rs violet; pod MluhuM- (,r 
ovate, usually pointed. — Saskatchewan to Texas. 
2. A. Mexicanus, A. DC. Taller, greener, less pubescent; flowers lii;liti'r colored orwliite; eal.vK 
softly white-villous or tomentose ; pod ovatc-globoso, scarcely pointed. — Missouri to S. Texas and the 
base of the Rocky Mts. 
* * Ovary hoary-hirsute ; pod sometimes becoming glabrate. 
3. A. Plattensis, Nutt. Loosely villous ; stipules rather large; flowers ochrolcncous or ]iuiiili>li 
above; pod ovate, acuminate, or oblong and somewhat curved. — Illinois to N. Alabama and ^v( -l to 
Nebraska and Texas. 
§ 2. DIPHYSI. Pod ovate or globose, membranous, iiillateii. n. ai ]y glabrous, sessile, completely 
2-celled and more or less didymous by the intrusion of both sutures, many-seeded. Perennial, 
many-stemmed; pubescence short or wanting ; stipules distinct, subadualo ; flowers rather small, 
white to purple or yellowish, spicate or subcapitate. 
4. A. DiPiiYSUS, Gray. Nearly glabrous throiigliout. See p;igo I5.'>. 
5. A. I.EXTIGINOSUS, Dougl. More or less fini ieou.s-pubesceut. See page 65. 
6. A. PLATYTEOPis, Gray. Froc. Amo: Jvad. i). :>->G. Dwarf and ali)iue ; silverj-'Silky. I'.r.. 
7. A. COULTERI, Benth,, (Arthu-Scholtii. Oiay.) may belong here, but annmil : pubescence ajijne-M .l- 
silky ; pod canescent or " silky-villous," 7-6"' hiwj;. cliartaceous. Placed in *j H; liy Dr. (Jray. 
$3. CH^TODONTES. Pod ovate, small, sessile, coriaceous, tur-i<l or at times subcompressed, 
more or less sulcate on the back, septum perfect, cells 3-4-()vuled. I'l rennial, many-stemmed, 
leafy, white silky-villous ; flowers rather small, yellowish, spicate, spreailiug ; calyx-tube short. 
* Leaflets 10-12 pairs, narrow, usually acute ; stipules free, subulate; calyx-tcetli -.tiicin-;. little 
shorter than the corolla.— Washington Territory. 
8. A. Spaldingii, Graj^ Proc. Aiim: Acad. 0. ."-'1. { .1. h>,l<„i, Torr,} A'illous-i.ube.-c nt. 1 lnuh ; 
leaflets 3-6" long, lanceolate or oblong-linear; peilimcles i \c, , .liii^r ilic l,a\.s; sjiike oMc . ' or 
rather loose at base; flowers nearly 5" long: bracts setar. nii-: ca yx veiy villous; po.. n^'. 
villous, scarcely sulcate, 2-4-seeded. 
9. A. Lyalli, Gray. White-silky; spike long, loose: lyedunclcs shorter; llnwer-^ Ion-: calyx 
viUons, the tube equaling the teeth; pod hoary, more deeply sulcate ; otherwi.se like the la^t. 
* * Leaflets 1-5 pairs, oblong or ovate; stipules adnate, short; calyx-teeth subulate, sliurtrr than 
the tube ; pod compressed. 
10. A. CALYCOSUS, Torr. Dwarf, white-silky ; spike 2-6-flowered, See page Oti, ai ' XIII. 
§ 4. MOLLISSIMI. Pod cartilaginous or coriaceous, sessile, oblong, turgid, ter. a both 
sutures, at length incurved, septum perfect. Perennial, subacanlescent, shining wiili a soft silky- 
