OF ARTS AND SCIENCES. 91 



but the muricate processes are larger. Two distinct forms of the 

 latter species are noted by Mr. Lemmon, one erect, the other diffuse- 

 procumbent, the corms also different ; and he suspects that /. cunei- 

 folia may be a form of one of these, with the leaflets confluent into a 

 cuneate simple leaf. 



Ipomcea Lemmoni. /. leptotomce, Torr. peraflSnis, prorsus glaber- 

 rima ; caule debili vix volubili e cormo vel tubere crasso oblongo ; seg- 

 mentis foliorum pedatorum angusto-linearibus elongatis (inajoribus 

 bipollicaribus) tenuibus; pedunculis filiformibus unifloris petiolum 

 gracilem hand superantibus ; pedicello perbrevi bracteolis setaceo- 

 subulatis parum longiori cum calyce glaberrimo ; sepalis oblongis 

 acutis submembranaceis, exterioribus costa vix prominula parce 

 tenuiter muriculata ; corolla angusta bipollicari ; fructu adhuc 

 io-noto. — Southern Arizona in the mountains near Fort Huachuca, 

 /. G. Lemmon* 



SolanacecB. 



Saracha umbellata, DC. Cat. Monsp. ? Sweet, Brit. Fl. Gard. 

 t. 85 ; G. Don, Syst. ; Dunul in DC., but '• Peru " cited as the country 

 by Sweet, and subsequent authors following the lead. Atropa umbel- 

 lata, Roth, Cat. ii. 26 (no habitat) ; Jacq. Ilort. Schocnbr. t. 493, who 

 gives "Mexico." A common Mexican species (the fruit edible and 

 sold in the markets), described under several names, such as S. Jato- 

 mata, Scblecht., and probably his aS'. alloqona ; also .S". glabrato, and 

 probably S. diffusa, laxa, and conspersa, Miers, S. Miersii, Dunal. 

 It came to be taken for Peruvian through some confusion with the 

 nearly related S. procumbens, Ruiz & Pav. First collected now 

 within the U. S. by Lemmon, in caiions near Fort Iluacluica, S. Ari- 

 zona. His specimens have peduncles shorter than the pedicels, which 

 is not usual. 



Margaranthus Lemmoni. Decumbenti-ramosissima, magis foliosa; 

 foliis omnibus integerrimis nee repandis ; calyoe profundius 5-dentato, 

 dentibus tubo nunc dimidio brevioribus ; corolla alba supra tubum 

 brevissimum campanulato-uiceolata, ore breviter obtuseque 5-lobo. — 



* I. tenuiloba, Torr. Bot. Mex. Bound. 148, — of which a specimen exists 

 only in the Torrey Flerhariuni, and wiiicli was accidentally omitted in Syn. Fl. 

 N. Amer., — is another species of this group. It has filiform leaflets, liardly 

 thicker than the petiole, the latter shorter than the stout peduncle ; sepals 

 oblong ; corolla as large as that of /. sagittata ; root unknown. Torrey's remark 

 on no. 1617, Wriglit, is to be excluded. That plant is /. lonr/i/olia, and the whole 

 sentence belongs to the account of that species on p. 149, and was accidentally 

 misplaced. 



