Calender) 
1. Ae Nuttallii Robinson. A lowfperennial (or biennial) from a 
branching caudex covered with persistent leaf-bases; leaves basal and 
cauline, the former tufted, obovate to spatulate, blades 1-1.5 cm. long, 
narrowed to a subequal or shorter petiole, entire, both surfaces hispid, the 
margins and petioles ciliate, the hairs simple, stout, rarely forked, cauline 
leaves oblong-oval, 1.5-2.5 om. long narrowed at the base, not auricled, 
flowering stems several, 10-20 om. tall, glabrous; flowers a oe 
hedi—of—bhe—svemp white; sepals glabrous, petals 4-6 mm. jong, ce the 
length of the sepals; pods erect, 10-20 mm- long, 1.5 mm. wide, 
curving somewhat, glabrous, valves veined, midvein obscure, the persistent 
style about 1 mm. long; seeds in one row, oval, 1-1-2 mm. long. 
Infrequent in crevices of high peaks and thin soiled subalpine meadows. 
2 Ae glabra (L.) Bernh. Tower Mustard. Stems erect, simple 
cm. tall, retrorsely hispidulous near the base, glaucous and glabrous above, 
often with a reddish tinge; basal leaves in a loose rosette, 5-6 om. long, 
soon withering, oblanceolate, entire or lyrately pinnatifid, more or less 
hispid, the hairs forking; canline leaves oblong=-lanceolate, 2-5 cm. long, 
glabrous and glaucous, or hispid @n the midvein beneath, strongly auricledy 
and clasping at the base; flowers crowded at the apex, the sepals narrowly 
oblong, the petals yellowish, somewhat exceeding the sepals; pods strictly 
erect, 1.2-1.5 mm. wide, 4-]0 cm. long, imbricated in a raceme 15-20 cm. long, 
glabrous, veiny, the midvein praminent, on pedicels 8-10 mn. long; seeds 5 
mme in diameter, somewhat margined, irregularly disposed in two rows. ———-~¥ 
+ (Turritis glabra L; A. perfoliata Lam.). 
Frequent throughout our region in thin soil and on rocky outcrops 
mostly below 4000 feet. 
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