CKUCIFER^. (mustard FAMILY.) 19 



the largest, eutire or coarsely sinuate-toothed or lobed, often cordate at ba.se; 

 radical leaves mostly simple and cordate-reniform : pods obtuse or scarcely 

 beaked with a short style, asctndtw/. — I'roc. Am. Acad. x. 339. C j>au 

 cisecta of Ilayd. Hep. 1870, 1871, 1872. From Wyoming to California and 

 Oregon. 



3. C. hirsuta, L. Stem 3 to \2 inches high, erect or ascending from a 

 spreadimj r/iisl,r of root-leaves : lenjiets 3 to 7 pairs, rounded; those of the 

 upper leaves oblong or linear and oJ)en coiiJiueiU: jlou-trs small: jxxls tnrt or 

 ascendiiuj in line ivith the pedicels ; 'Jtyle very short or almost uoue. — From 

 Colorado to Alaska and eastward across the continent. 



3. PARRYA, R. Br 



Style rather short; lobes of the stigma connate. Seeds flat, orbicular, with 

 a broad meml>ranous border. — Low herbs, with thick perennial roots and 

 numerous scapes with racemed flowers. 



1. P. nudicaulis, Regel. Rootstock fusiform: scape 4 to 6 inches 

 high : leaves broadly lanceolate, incisely toothed : petals rose-color or purjde, 

 retuse : pods broadly linear, erect, slightly incurved, somewhat constricted 

 between the seeds, which are slightly corrugated. 



Var. aspera, Regel. Pilose with glandular hairs. 



Var. glabra, Regel. Whole plant glabrous. — Both varieties are inclmled 

 in the P. macrocarpa. of Bot. King's Exp. 14 and Torr. & <^ray, Fl. i. 88 

 Near the summit of oue of the highest peaks of the Uintas ( Watson). 



4. ARAB IS, L. Rock Cress. 



Anthers short, hardly emarginate at base. Stigma entire or somewhat 

 2-lobed. Pod linear. Seeds flat and usually winged. — Erect, with perpen- 

 dicular roots and uudivided leaves, tiie cauline usuiUly clasping and auricled 

 at base. 



Id Biennials : pods erect or ascending: Jioicers small, irhite or nrarli/ so. 



1. A. perfoliata, Lam. Glaucous: stem stout, usually simple, 2 to A 

 feet high, mosthj g/ahrons hut often hirsute toward the base: lower leaves spatu- 

 late, sinuate-pinnatijid or toothed ; the cauline entire, ovate or ovate-lanceolate, 

 clasping bij the sagittate base : petals little exceeding the .sepals : pods errrt and 

 iisuallg appressed, narrowly linear ; style short : seeds in two rous, narrow ly 

 winged or wingless. — Across the continent and far northward. 



2. A. hirsuta, Scop. Rough-hairg, sometimes smoothish, 1 to 2 fret high : 

 leaves often rosulate at the base ; the cauline ovate to oblong or lanceolate, 

 entire or toothed, j)arlli/ clasping by a somewhat sagittate or cordate Inise : petali? 

 greenish-white, /ojj^'er //(«» the sepals: p( diet Is and pods strictli/ upright : style 

 scarcely any: seeds in otK row, ivingless. — Colorado and northward, and east- 

 ward across the continent. 



3. A. spathulata, Nnlt. Hirsute, dwarf and somewhat rcspitose, about 

 4 inches high : root thick, crowned with vestiges of former leaves and .stems: 

 leaves spatulate-ohlong, entire; radical leaves on rather long petioles: pelaU 

 about twice the length of the sepals: pedicel about half the length of the po<l, 

 which \s rither short, diverging, pointed with a distinct slender sti/lc : seedt ici'* 



