APPENDIX. 



17. Ranunculus aquatilis, L., var. stagnatilis, DC. {R. di- 

 varicatus, of Gray's Manual.) 



"Frequent forms occur connecting this with the variety tricho- 

 phyllus. It can hardly be R. divaricatns, Schrank, as European 

 and Asiatic specimens of that species show a well-defined lamina to 

 the segments of the leaves, while in American specimens they are 

 always filiform. " Watson's Rep. in King' s Exp. 

 CLEOME, L. 



Sepals distinct or somewhat united. Stamens 6 or rarely 4. Torus 

 minute. Pod linear or oblong, subsessile or stipitate. — Annual herbs 

 or shrubs with digitate or simple leaves and racemed or solitary 

 flowers. Benth. c-' Hook. 



83. C. INTEGRIFOLIA, Torr. & Gr. —Annual, somewhat glaucous, 

 2 5' " n igh> widely branching; leaves 3-foliolate; leaflets lanceolate, 

 (the lower-most oblong) entire, submucronate; racemes sometimes 

 nearly I c long: flowers large, showy, reddish purple, rarely white; 

 sepals united to the middle, persistent, segments triangular- acumi- 

 nate; petals with very short claws; stamens equal; pods oblong- 

 linear, compressed, much longer than the stipe. Flor. Co/., Port. 6r* 

 Con/. 



91. Viola Canadensis, L. — As yet found only at Decorah. Our 

 plant varies from the typical one in having much smaller pink flow- 

 ers, whose lateral petals are not bearded; as well as in general as- 

 pect, which is decidedly like V. pzibescens. 



124. PORTULACA RETUSA, Engel.— Like P. o/eracea, but greener, 

 and the stem more ascending, sometimes covering a space several 

 feet in diameter: leaves usually smaller than the common species; 

 sepals obtuse, broadly carinate winged; petals yellow; stigmas 3 or 4; 

 capsule 2^"- 3" long, broader in proportion; seeds more strongly 

 tuberculate than in P. o/eracea. Flor. Cal. 



131. Callirrhoe INVOLUCRATA, Gray. Hirsute; stem branch- 

 ing, procumbent; leaves deeply 3-5-parted, covered with stellate 

 hairs, segments linear-lanceolate, laciniately 3-5-toothed; peduncles 

 erect, 1 -flowered, longer than the leaves; flowers few in a loose pan- 

 icle, about \]/ z ' in diameter, axillary, scarlet; bracteoles 3, linear-lan- 

 ceolate, 2,< the length of the deeply-parted calyx; carpels numerous, 

 hairy, not wrinkled. F/or. Col., Port. &* Con/. 



