16 BOTAI^JY. 
short; glabrous throughout; tall, 3° high; leaves lanceolate, acuminate. 
Humboldt Slough, Nevada. (63.) 
Var. Erect, 6-18' high, glabrous; leaves lyrate, the lateral segments 
for the most part obsolete, the terminal lobe ovate-oblong, obtuse, siiiuately 
and obtusely dentate, or entire ; pods oblong, (3" long,) equaling or exceeding 
the pedicels. AVahsatch Mountains, Utah; 6-8,000 feet altitude. No. 482 
of Geyer's collection is the same ; nearly intermediate between palustre and 
ohtusum. (64.) 
Barbarea vulgaris, Br. Indigenous from Lake Superior north and west- 
ward, and on llic Pacific Coast from Sitka to the Sacramento; collected by 
liigclow ill X(;w Mexico. Not uncommon in the mountain canons of Nevada 
and Utah; 6-8,000 feet altitude; June-August. (65.) 
Var. gracilis, DC. This is merely a reduced sub-alpine form. East 
ITuniholdt and Clover Mountains, Nevada, and in the Wahsatch ; 9,000 feet 
altilii(U3; June-Septcnib(M-. (66.) 
Arabis hirsuta. Scop. A low ordinary form; l'^ in height ; radical leaves 
always rosnlatc : stems slender, willi a few distant oblong or ovate leaves, 
tew, to niany-tlowered ; peilicels more or less spreading. Wahsatch and 
Uinia .\rouniains, Utah; G-7,000 feet altitude. (67.) Also another com- 
"lon lunn, nuich stouter and taller; strictly radical leaves often wanting, 
while the cauline ones are numerous and more or less appressed, approaching 
A. prrjoUata in liabit, from which only flowering specimens cannot always 
rea<lily l»e (list ingnislie<l. Hio species is found from Virginia north to the 
Arcti(. Circle, and wr>st to the Pacitie. It was collected by Fendler in New 
Mrxico. On l)anks <,f mountain streams, Nevada ami Utah, at an elevation 
(d r)-(;,r)(l() t.-cl : June-Octobcr. (68.) 
Arahis platvspkkma, (irny. Proc. Amer, Acad. 6.519. Low, (J-l° 
hiirli.) from a wou.ly l,ase; leaves, with tlu- stem, hoary wdth a stellate' pubes- 
r.-n.v. spatuiale, rntuv, the uppermost oblong, sessile, obtuse ; raceme few- 
llow.Mvd: l]<»w,.rs lunk; pods erec-t, straiglit, broadly linear, (l-2i' \on<r 2^" 
broad ) acuminate, llattened ; valves h.os.ly reticulated; stigma sessile ;\eeds 
broadly wm^ed.-In the Sierra Nevada, (Brewer,) at an elevation of 13,000 
h.t. lound m tlie ^^ast llundxddt Mountains, Nevada, at 8,000 feet altitude ; 
Septemi)er. ((iil.") 
Arabis CAN, .\m.(U (-(. ;-«W«, Xult.) Perennial, caespitose, 
more.,.- less lmary-|,ul,rs,-..„|, „i,l, sl,.|l..,le lunrs: leaves ,.„(i,v. spntnlatc- 
