1336 APPENDIX 



late in outline, with 3-7 pale-margined spine-tipped pinnate teeth, sessile at the end 

 of the petiole which is usually 2-3 cm. long: flowers in fascicles on scaly spur-like 

 branches: pedicels slender, 5-10 mm. long: outer sepals ovate, obtuse; inner sepals 

 obovate, much longer than the outer: petals yellow, 3^ mm. long: berries globular, 

 4-5 mm. in diameter, red. — Differs from B. Swazeyi in the thick prominently toothed 

 leaflets the lower pair of which are remote from the base of the petiole. 



In dry or stony soil, Texas and adjacent Mexico. Fall, winter and early spring. 



Page 462, for " Argemone delicatula" read " Argemone pinnatifida Norton." 



Page 468, between Synthlipsis and Lesquerella insert: 



4a. DITHYRAEA Harv. 



Herbs, with stems often branched at the base. Leaves alternate, often mainly 

 basal: blades sinuate or pinnatifid. Flowers in terminal racemes. Sepals narrow, 

 deciduous. Petals white or purplish, clawed. Style very short. Pod 2-lobed, the 

 lobes conspicuously margined, each cavity 1 -seeded. — Differs from Synthlipsis in the 

 short style and the single-seeded pod-cavities. 



1. Dithyraea "Wislizenl Engelm. Stem 2-6 dm. tall, closely pubescent, often 

 branched at the base, the branches ascending or spreading, rather copiously leafy: 

 leaf -blades lanceolate, varying to ovate-lanceolate or linear-lanceolate, 3-8 cm. long, 

 or shorter near the inflorescence, sinuate or pinnatifid, those of the lower leaves nar- 

 rowed into petiole-like bases, those of the upper merely sessile: racemes becoming 1-4 

 dm. long and lax at maturity: pedicels elongating, reflexed at maturity: sepals linear 

 or linear-lanceolate, 3.5-4.5 mm. long, ciliate: petals 6-7 mm. long, the blades sub- 

 orbicular, longer than the claws: pods 12-14 mm. wide, notched at the base, finely 

 pubescent. 



On dry or sandy hillsides, Arkansas to southern Utah, Texas, Arizona and adjacent 

 Mexico. Spring and summer. 



Page 473, after Boripa obtusa, insert: 



1. Rorlpa montkna (Wall.) Small. Annual or biennial, glabrous or nearly 

 so. Stems 1-4 dm. long, more or less diffuse, usually much-branched: leaves rather 

 few; blades oblong varying to lanceolate or obovate, unevenly toothed or pinnatifid, 

 4—15 cm. long: pedicels less than 4 mm. long, spreading or ascending: sepals oblong 

 or linear-oblong, 2-2.5 mm. long: petals yellow, about as long as the sepals, or 

 wanting: pods linear, 1.5-2.5 cm. long, ascending or spreading. — Differs from related 

 species in the larger flowers and the slender pods. 



In ditches, about New Orleans, Louisiana. Naturalized from Asia. All year. 



Page 476, after Erysimum Arkansanum, insert : 



3. Erysimum inconspfcuum (S. Wats.) MacM. Kough-pubescent. Stems 3-7 

 dm. tall, simple or sparingly branched: leaf -blades oblanceolate to linear, 1.5-8 cm. 

 long, entire or toothed: pedicels erect or ascending, rather slender, ultimately 4-5 

 mm. long: sepals linear, 4—5 mm. long: petals yellow, spatulate, 7-9 mm. long: pods 

 slender, erect or ascending, 1.5-3.5 cm. long. — Differs from E. ArJtansanum in the 

 small flowers and pods. 



In dry soil, Ontario to Manitoba, Alaska, Arkansas and Nevada. Summer. 



Page 479, after Draba micrantha, insert: 



3a. Draba ^prica Beadle. Annual, finely appressed-pubescent. Leaves distant; 

 blades obovate or oval to oblong or linear-lanceolate, 19-26 mm. long, coarsely few- 

 toothed: peduncles very short or wanting: terminal raceme elongated, the lateral 

 racemes wholly or partially congested: sepals oblong, becoming 0.8-1 mm. long: 

 petals spatulate, 2.5-3 mm. long: ovary pubescent: pods linear-elliptic 4-6 mm. long. 

 — Differs from D. micrantha in the toothed leaf -blades, taller stems and the much 

 smaller pods. 



In dry soil, Kenesaw Mountain, Georgia. Spring. 



Page 484, after Arabis patens, insert: 



5a. Arabis Georgi^na Harper. Biennial. Stem 3-5 dm. tall, with few erect 

 branches mostly from the base, minutely hirsute below, glabrous or nearly so above: 

 basal leaves 6-8 cm. long, in a flat rosette; blades oblanceolate or spatulate, coarsely 

 toothed: cauline leaves spreading or ascending; blades 3-6.5 cm. long, oblong-lanceolate 



