244 Edward L. Greene: Novitates Boreali-Americanae. II. 
foliosi; foliis omnibus parvulis integris pube brevi dendritica canes- 
centibus, infimis oblanceolatis petiolatis, caulinis oblongis sessilibus; 
floribus perpaucis, plerumque 3 tantum, brevissimis, subsessilibus, sepalis 
apicem versus pube dendritica sparsim obsitis; petalis lilacinis, purpureo- 
nervatis, calyce duplo longioribus; siliquis glabris linearibus apice acu- 
minatis, 4—5 cm longis, strictissime erectis. 
From the mountains of middle eastern California, region of 
Dinkey Creek, Fresno County; collected by Hall & Chandler, in 1900; 
distributed under no. 354, and with the name A. platysperma, which is a 
very different plant from this. Bolanders 4970, which is from the 
Mariposa Big Tree Grove, is the same. Its habitat is of much lower 
altitude than that of A. platysperma, which is fairly alpine. 
16. Arabis pratincola Greene, nov. spec. 
Caulis, e radice sublignosa ut videtur perenni, unicus erectus simplex 
modice validus 3—4 dm altus, aut omnino glaber aut basim versus pilis 
sessilibus trifurcis et adpressis subvestitus. Folia basalia pro planta 
parva, vix 1,5 em longa, lanceolata, petiolata, integra; caulinia multo 
majora, usque 2,5 em longa, oblongo-lanceolata, sessilia, sagittato-auri- 
culata, acuta, suberecta, omnia utrinque pube subsessili trifurca plus 
minus conspicue obsita. Flores pro genere majusculi, lavandulacei, in 
racemo brevi simplici dispositi. Siliquae immaturae lineares, angustissimae, 
usque 5 cm longae obtusae. 
Mountains of Douglas Co., Nevada, June 1902, C. F. Baker; distri- 
buted under his no. 1149. Species somewhat allied to A. Drummondii, but 
with different pubescence and quite another general aspect; said to grow 
in meadows along streams. 
17. Arabis Missouriensis Greene, nov. spec. 
Caulis e radice bienni, vel forte perenni, erecta, simplex, rigida, 
pedalis et ultra; planta tota glabra, viridis, glaucescenciae omnino carens, 
folis basalibus rosulatis depressis obovato-lanceolatis, sinuato-dentatis, 
caulinis oblongis, fere erectis, sessilibus, auriculatis, inferiorum mar- 
ginibus serrato-dentatis, superiorum integris; siliquis elongatis, angustis, 
rectis et suberectis, apice stylo brevi acuminatis, aeque ac herba tota 
atrovirentibus nec glaucis. 
Plant collected by B. F. Bush, at Montier, Missouri, 15 May 1894; 
his no. 31 as represented in my herbarium, and said to be common in 
the region where obtained. It has been labelled A. brachycarpa, Britton, ` 
the rightful name of which is A. confinis, Watson, but that is a glaucous 
plant, and pubescent. The present species is of as deep a green as 
A. hirsuta, which it much resembles, save that it is wholly destitute of 
pubescence, and has broad pods, and pointed. 
ods, 
