242 Edward L. Greene. 
7. Arabis peramoena Greene, nov. spec. 
Planta perennis, pro genere magna, 4—6 dm alta, basi suffrutescens, 
facie genus Matthiolam referens; herba tota pube brevi plus minus 
dendritica cinerascens. Folia omnia tenuia, integerrima, inferiora oblanceo- 
lata subpetiolata, superioria sessilia sagittato-auriculata. Flores majus- 
culi patentes (nec cernui) in racemum brevem dispositi, eorum et sepalis 
et petalis saturate rubro-purpureis. Siliqua ignota. 
A most beautiful Oregoniam species, distributed by Mr. Cusick 
in flowering specimens only, under no. 2369, collected in Malheur Co., 
4 May, 1900, the specimens being labelled A. pulchra, to which species 
the plant is not so very nearly allied. 
8. Arabis trichopoda Greene, nov. spec. 
Perennis, basi fruticosa, ramis annotinis floriferis paucis, erectis, 
3—5 dm longis, inferne crebre foliosis, superne longiuscule racemosis; 
foliis infimis anguste oblanceolatis, integris, adscendentibus, utrinque 
stellato-tomentulosis, proximis lineari-oblongis, erectis, sessilibus, auri- 
eulatis; florum pedicellis filiformibus, 1—2 cm longis, deflexis; sepalis 
pube stellata obtectis nequaquam coloratis; petalis angustissime unguicu- 
latis calyce duplo longioribus, atrorubentibus; siliquis angustis, obtusius- 
culis, circa 4 cm longis, vel rectis vel parum incurvis. 
A handsome species of south western Nevada, and adjacent desert 
regions within the Californian boundary. The specimens are partly from 
the Californian side, were collected by Marcus E. Jones in 1894 to 
1897, and were named by him Arabis pulchra var. gracilis; but the plant 
is too markedly different in many ways from the true A. pulchra. 
9. Arabis Austinae Greene, nov. spec. 
A. Breweri affinis, duplo major, caudice lignoso multo minus ramosa, 
nunc trifurea, nunc bifurca tantum; foliis nunquam canescentibus, sed 
pube minuta stellata sparsissime indutis pallide virescentibus, basilaribus 
ampliuseulis, 5 cm longis, 1 cm latis, oblongo-lanceolatis obtusis, repando- 
dentatis, petiolatis, caulinis sessilibus angustis et angustissime sagittato- 
auriculatis; sepalis fere glabris, apice petalisque rubro-purpureis; siliquis 
6 cm longis, angustis, acutiusculis, leviter arcuatis. 
This very marked species of the 4. Breweri group is known to me 
only as in my own herbarium, as collected by Mrs. Austin on Little 
Chico Creek, California, in March and April, 1896. A. rather thin leaf- 
texture in another characteristic. 
10. Arabis epilobioides Greene, nov. spec. 
A. Breweri proxima, et ejus instar pumila, caudice brevi multicipiti 
sublignosa crebre foliosa; differt pube longiore sparsiore magis hirta, vix 
stellata; foliis caulinis ovato-lanceolatis patentibus, basi breviter an- 
gustata haud auriculata sessilibus; siliquis saepe levissime recurvis, inter- 
dum rectis, nunquam arcuatis. 
Near the summit of Mount Sanhedrim, Lake Co., California, 24 July 
1902, A. A. Heller; distributed for A. Breweri, from which it is clearly 
distinct by characters of pubescence, of cauline haves, and of the pods, 
