1 1 > ADDITIONS AND CORRECTIONS 



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acuminate :it the apex, the uppermost much narrower, but the divisions 

 n.it narrowly linear; sepals oblong, 4 mm. long; petals bright yellow, 5-6 

 nun. loim; pedicels in fruit more or less spreading, 1-1.5 cm. long; pod 

 ascending, about o cm. long, 1 mm. thick. Sisymbrium Loeselii L. Waste 

 places and roadsides: Conn. Ida. Neb.; adv. from Europe. Je-Jl. 

 339 (>u line 1C), instead of "pod over 1mm. thick" read "pod 1 mm. thick 



or more.' 



;;i.~> The authority of Campe verna should be (Mill.) Heller. 

 340 Before 32. Athysanus insert: 



31a. DIPLOTAXIS DC. 



Annual or perennial herbs, with alternate more or less toothed or 

 lyrate-pinnatifid leaves. Flowers perfect, in elongate racemes. Sepals 

 a-cemling, equal. Petals yellow, lilac, or white, clawed. Pods elongate, 

 flat or somewhat compressed, with an elongate slender beak. Seeds in 

 two rows, ovoid, slightly compressed. 



1. D. erucoides DC. Annual, pubescent at least below; stem 3-5 

 dm. high; lower leaves lyrate-pinnatifid, 5-12 cm. long, with oval den- 

 tate lobes, rounded or obtuse at the apex; petals white, veined with rose 

 or lilac; pods nearly erect, 2-3 cm. long, twice as long as the ascending 

 pedicels. Waste places: Mont.; adventive from Mediterranean region. 

 Je-S. 



347 For I. platysperma (a misprint) read Idahoa scapigera, the authority 

 being correct. 



348 First line of the key, instead of "Leaves all entire" read "None of 

 the leaves pinnatified. " 



354 For D. ventrosa read D. ventosa. 



354 Under D. densifolia insert as synonym : D. Paysonii Macbr. The differ- 

 entiations pointed out by Macbride are not constant. 



356 After D. aurea insert: 



48a. Draba neomexicana Greene. Perennial, with a branched caudex; 

 stem 1-1.5 dm. high, densely stellate; basal leaves clustered, 1 cm. long 

 or less, spatulate, thick, contracted below into a distinct petiole, densely 

 stellate; stem leaves much smaller, oblong-. lanceolate; raceme lax; ped- 

 icels 6-8 mm. long; calyx stellate; petals white or light yellow, 3 mm. long; 

 pod 5-7 mm. long, minutely stellate, the style about 1 mm. long. Rocky 

 places: N. M. Colo. Ju. Jl. 



359 After A. microphylla insert: 



13a. Arabis nubigena Macbr. & Pays. Tufted perennial; stem 5-10 

 cm. high, sparingly stellate; leaves mostly basal, 5-10 mm. long, narrowly 

 oblanceolate, sparingly stellate, entire; stem leaves few, nearly glabrous, 

 reduced, lanceolate; sepals oblong, glabrous, 2 mm. long; petals pinkish, 

 4 mm. long; pedicels in fruit nearly erect, 6-8 mm. long; pod erect, 3-4 

 cm. long, 2 mm. wide, glabrous, acuminate. Exposed summits: Ida. 

 Alp. Au. 



360 After A. subpinnatifida insert: 



17a. Arabis puberula Nutt. Perennial; stem 1-3 dm. high, densely 

 stellate, leafy; leaves firm, densely stellate, 1-2 cm. long, the basal ones 

 oblanceolate or spatulate, entire, obtuse, the stem-leaves lanceolate, 

 acute or acuminate; sepals stellate, 4 mm. long, reddish; petals 7-8 mm. 

 long, tinged with pinlc; pods pendent, on reflexed pedicels 6-7 mm. 

 lon<;. straight, 4-6 cm. long, 1.5-2 mm. wide, more or less stellate. Dry 

 hillsides: Ore. Ida. Nev. Je Jl. 

 363 For Phoenocaulis read Phoenicaulis. 



Under Phoenicaulis Huddelliana insert as synonym, Anetsonia eurycarpa 

 (A. Gray) Macbr. & Pay. The authors regard this species as representing 



