42 



CRUClFERJil. Smelowskiu. 



16. SMELOWSKIA, 0. A. Meyer. 

 Pod short, pointed at each end, 4-angled, few-seeded : valves strongly 1-nerved 

 and carinato. iSeedg in one row, oblong, not margined ; cotyledons incumbent, 

 i'otals white or i)iidcish : anLliei's oval to oblong. — Dwarf n\[>'um perennials ; leaves 

 narrowly pinnatilid. 



A genus of 4 or 5 species, all Siberian, and one of tiium also found in the mountains of Western 

 America. A doubtful Culifornian siiecies is added. 



1. S. calycina, C. A. Meyta-. Densely white-tomentose to nearly glabrous, cespi- 

 tose, the uiucli-branclied rootstoik thickly coveriid with the sheathing bases of dead 

 leaves : stems erect, sim[)le, 2 to 6 inclies high : leaves mostly radical and with 

 long slender petioles, pinnate ur pinnatilid ; segments linear to oblong, entire or 

 sparingly lobed : calyx villous : jjctals '2 lines lung : pods 3 to 6 lines long, a lino 

 wide, attenuate to each end and beaked with the short style and broad stigma, 

 ascending on spreading pedicels : seeds 2 to 8, a line long. — Ilutchinsia calycina, 

 Desv. ; Hook. Fl. i. 58, t. 17, fig. B; Watson, Eot. King Exp. 24. 



On Lassen's Peak and in the northern Sierra Nevada {Lemmon) : from Colorado to Oregon and 

 northward to the Arctic Ocean. 



2. S. (0 Fremontii, Watson. Pubescent witli scattered short spreading hairs, 

 the branching woody base with few remnants of old leaves : stems 2 to 4 inches 

 high : leaves less than half an inch long, jjinnate with 1 to 3 pairs of linear leailets, 

 which are strongly nerveil and somewhat revolute : sepals smooth, ovate to broadly 

 oblong, less than a line long, the white petals twice longer : pods (not mature) 2 to 

 3 lines long, somewhat (djcom pressed, olituse at base and scarcely attenuate above, 

 beaked witli the short tliick style ; valves faintly nerved : seeds small, 10 or more 

 in each cell ; cotyledons obliquely incumbent. — ]*roc. Am. Acad. xi. 123. 



Hills around Klamath Lake {Fremont) ; Sierra Co. (?), Laiimon. JIuch reseinldiuf' the last 

 species in habit, Init referred to the genus with doubt as the fruit is apparently abnormal in being 

 comparatively obtuse and terete, and in the obliijuity of the cotyledons. 



17. NASTURTIUM, U. Ihown. 



Pod oblong or short-linear, terete or nearly so : valves nerveless. Seeds in 2 

 rows, small, turgid : cotyledons accumbent. — Growing in water or in moist places, 

 smooth or nearly so, with white or yellow flowers, and with the leaves (in our spe- 

 cies) pinnatilid or lyrate. 



A genus widely distributed, of scarcely 20 species according to Beiitham and Hooker, but many 

 more are recognized by most authors. There are about 10 native American species, chielly 

 confined to the Mississippi Valley and the region westwanl. 



* Flowers small, pale yellow : stems not rootliKj : leaves pinnatiftd or toothed. 



1. N. palustre, DC. A stout biennial, glabrous, erect, 1 to 3 feet high, branch- 

 ing : leaves lanceolate, lyrately pinnatilid, petioled, 2 to 6 inches long : petals a 

 line long : pods oblong, 3 to 4 line> long, equalling the spreading pedicels, acutish 

 at each end or obtu.se above, tipped iiy the j)romiiient style. 



Var. hispidum, l-'ischer ^ Meyer. Somewhat hispid : poils shorter, globose- 

 oblong, 2 lines k'Ug. 



Near the eastern border of the State in Truckee Valley {Watson), and common north and east- 

 ward, fiom Arctic America to the Gulf of Mexico. 



2. N. curvisiliqua, Nutt. Annual or biennial, smooth, usually erect, ^ to 1 

 foot high : leaves narrowly oblong or oV>lanceolate, piiniatilid with oblong usually 

 toothed lobes, rarely only sinuate-toothed : petals a little exceeding the sepals : pods 

 rather slender, 4 to 6 lines lung ; style prominent or none ; pedicels usually nearly 



