204 University of California Publications in Botany [Vol. 9 



Range. — Pacific Coast south of British Columbia and east to 

 Wyoming and Colorado. 



Zone. — Transition and Canadian. 



Specimens examined. — Slide Mountain, Washoe County, Nevada, 

 7,500 feet, Heller 10206 ; Yuba Pass, Sierra County, 6,500 feet. Hall 

 and Babcock 4518; near Sonora Pass, 8-10,000 feet. Brewer 1890; 

 Volcano Creek, Tulare County, 8,000 feet, Hall and Babcock 5316. 



Cardamine hellidifolia L., a high arctic species of circumboreal 

 range, comes to the border of our region as the var. pachyphylla 

 Coville (Proc. Biol. Soc. Wash., vol. 11, pp. 169-171. 1897), but is 

 not known south of Lassen Peak, 3Irs. Anstin in 1879. 



8. PARRY A 



1. Parrya Menziesii (Hook.) Greene, Fl. Fran., p. 253. 1891. 



Hesperis Menziesii Hook., Fl. Bor. Am., vol. 1, p. 60. 1830. 

 Phoenicaulis cheiranthoides Nutt., in T. and G., Fl., vol. 1, p. 89. 1838. 

 Plwenicaulis Menziesii Greene, Bull. Torr. Bot. Club, vol. 13, p. 143. 1886. 



Type locality. — California. 



Range. — California east to Nevada and north to Washington. 



Zone. — Arid Transition and Canadian. 



Specimens examined. — Fremont Peak, Hy Edward 502; Summit, 

 Kellogg; Castle Peak, near the highest point at 9,000 feet. Heller 7085; 

 high mountain near Donner Pass, Torrey 16 ; Ebbett's Pass, 8,500 feet. 

 Brewer 1995; King's Canon, Ormsby County, Nevada, 1,700-2,000 m., 

 Baker 991. 



The high mountain form of this species has the ba.sis of the siliques 

 broader and pubescence denser than the lowland form. 



9. ARABIS 

 Seeds in two rows. 



Flowers deep purple; stems short (rarely more than 1 foot high); pods 

 usually erect, sometimes reflexed. 

 Sepals glabrous; stems and foliage green or slightly glaucous and nearly 



glabrous 1. A. Lyallii 



Sepals pubescent; stems and foliage ashy-pubescent 2. A. Lemmoni 



Flowers white or pink; stems taller. 

 Mature siliques erect or ascending. 



Basal leaves glabrous or with a few centrally attached hairs; pods erect 



or strongly ascending 3. A. Drummondii 



Basal leaves pubescent with mostly 3-forked stellate hairs; pods divari- 

 cate 4. A. brachycarpa 



Mature siliques sharply reflexed 5. A. Holboellii 



Seeds in one row. 



Silique stiffly erect, acute; seeds orbicular, broadly winged 



6. A. platysperma 



Siliques recurved, blunt; seeds somewhat wing-margined. 



Pods pubescent and faintly nerved 7. A. repanda 



Pods glabrous-shining and distinctly nerved 8. A. iuamoena 



