APPENDIX. 447 



2. 0. podoCahPa, Gray. Doprossed-csespitose, the caudex miicli divided, white-villous, at length 

 becoming glabrous; stipules long-adnate to the petiole; leaflets 5-11 pairs, crowded, linear-lanceolate or 

 ohlong-linear, 2-4" long ; peduncles equaling the leaves, 2-flowered ; keel of the bluish (?) corolla short- 

 mucrouate; pod oblong-ovate, about 1' long, thin-membranous, snbglabrons, very sharply acuminate, on 

 a slender stipe equaling the calyx.— Labrador, Arctic Regions, and in the Eocky Mts. in lat. 49°. 



§ 3. CAMPESTEES. Pod coriaceous or chartaoeons, not bladdery or but slightly so, sessile or sub- 

 stipitate, septate from the ventral suture to the middle or almost" completely, the dorsal suture 

 rarely somewhat intruded. Acanlescent ; stipules long-adnate ; flowers spioats or capitate, usually 

 many, rarely 2-4 ; pods erect. 



* Leaflets in pairs. 

 (a.) Scapes 2-5-flowered. 



3. 0. Uralbnsis, L., Var. pumila, Ledeb. Silky-villous ; scapes 1-2' long ; leaflets about 4 pairs, 

 3" long; flowers violet-blue, scarcely exceeding the calyx; pod oval-oblong or long-oblong, the ventral 

 septum extending to the dorsal suture. — Arctic shores and islands, and in the Eocky Mountains to Col- 

 orado. 



(b.) Spikes or heads many-flowered. 



4. O. CAMPESTRis, L. Pod chartaoeous, ovate or ovate-oblong, somewhat inflated ; flowers yellowish, 

 tinged with violet, rarely blue ; leaflets in many pairs, oblong-lanceolate, not silky-canescent. — Arctic 

 regions to Labrador, Maine, and in the Eocky Mts. to Colorado. See page 77, 



5. O. Lambbrti, Pursh. Pod coriaceous, sometimes nearly cartilaginous, erect, oblong- or elongated- 

 cylindric, over 1' long, 2-3" broad, nearly 2-c6lled ; scapes 6-12' high ; flowers 8-12" long, spicate, purple, 

 violet, ochroleucous or white ; leaflets in many pairs, lanceolate, oblong, or linear, hoary-silky, as also the 

 calyx; stipules mostly very hirsute or woolly. — From the Saskatchewan to Texas and New Mexico, and 

 west to the Eocky Mts. and Washington Territory. 



6. O. NANA, Nutt. Ctespitose, much-divided ; scapes 2-3' high ; leaves very-crowded, more hoary- 

 silky ; leaflets 3-4 pairs ; flowers 9-12, capitate, rather large, blue ; pod not known. — Eocky Mts. of 

 N. Colorado, (Nuttall,) and Montana. 



* * Leaflets mostly somewhat verticillate. 



7. O. SPLENDENS, Dougl. Silvery silky-villous, 6-12' high ; leaflets 3-6 together, usually 5-10" long ; 

 flowers erect-spreading, blue ; pods ovate, erect.— From Nebraska to Bear Eiver in British America and 

 west into the Eocky Mts. 



5 4. MONTTLNiE. Pod thinly coriaceous, oblong or cylindrical-elongated, somewhat half-2-celled by 

 the impression of the ventral suture, shortly stipitate or nearly sessile. Caulescent or subacaules- 

 cent, with scapelike peduncles ; upper stipules at least adnate, but only at base ; leaflets crowded ; 

 flowers bright-blue, spicate or capitate, rather small with a short calyx-tube, spreading ; pods 

 usually spreading or deflexed. 



8. O. DBFLEXA, DC. From the Saskatchewan to the Eocky Mts. and N. Colorado. 



HORKELIA. 



With the following genus Ivesia, as arranged by Dr. Gray in Proc. Amer. Acad., Vol. VI, pp. 528-532, 

 (1866,) but with the addition of several more recent species. 



* Leaflets somewhat rounded, or cuneate, dentate and incised. 

 (a.) The accessory calyx-segments equaling the true ones or nearly conformed to them ; cymes with 

 subleafy bracts, the alar flowers upon longer pedicels. 



1. H. Califohnica, Ch. & Sch. Villous-pubescent or sometimes silky, somewhat viscid above, ^2° 

 high ; stipules incised or mostly entire ; calyx-lobes large, triangular-lanceolate, the accessory ones 

 ovate-oblong, or sometimes lanceolate-ovate, occasionally bifid or toothed at the apex ; petals oblong or 

 obovate-oblong, shorter than or equaling the calyx.— California. 



(b.) Accessory lobes much smaller than the true ones. 



2. H. PARViPLORA, Nutt. Tomentose ; stem leafy ; upper leaflets cuneiform ; flowers small, petals 

 spatulate. See page 89. 



3. H. CAPITATA, Lindl. Somewhat glabrous, the stem viscid-pubescent toward the top ; upper leaf- 



