154 UNITED STATES AND MEXICAN BOUNDARY. 



difficult 



cannot at present be determined satisfactorily^ either from the imperfection of the specimens, or 



means 



Margaeanthus solanaceus, Schlecht. IncL Sera. Hort. Hal. 1838, p. 8, d Hort. Hal. p. 1^ t. 

 1 ; Ditnalj I. c, p. 453. Santa Rita del Cobra, New Mexico, July — August ; Bigeloio. (No. 

 1603, Wright,) No. 1220 of Coulter's Mexican Collection. Our New Mexican specimens and those 

 of Mr. Wright are considerably smaller than the plant represented by Schlechtendal, but his 

 figure was taken from a cultivated specimen. Coulter's plant agrees exactly with the figure. 



Lycium pallidum, MterSj IlL S. Amer. PL 2, p. 108, t. 67, G. Gravelly hills near the Rio 

 Cibolo of the Rio Grande ; also in Chihuahua and near the Copper Mines, New Mexico, April 

 July ; Bigeloio. (No. 760, Fendler.) It was also found by Fremont in 1844, on the Rio Yirgen, a 

 branch of the Colorado, western New Mexico. A shrub 3-4 feet high. Flowers greenish, larger 

 than in any other North American species of this genus. It is remarkable for the loose cam- 

 panulate calyx, the broad obtuse divisions of which are longer than the tube. 



Lycium stolibum, MterSj I c. p. 126, t. 71, G. On the Rio Grande, from the Presidio down 

 to Laredo, May; Schott. (Nos. 540 and 1610, Wright.) 



Lycium barbinodEj Miers^ L c. p. 115, t. 68, E. On the upper Rio Grande and westward to 

 the Rio Grande, March — April. A shrub about 5 feet high. 



Lycium Berlandieri, Dunal in DC. Prcdr. 13, pars 1, p. 521. Borders of the Rio Grande, 



i 



from El Paso to Eagle Pass, March — April. Nos. 1604 and 1608, Wright^ seem to be hardly 

 distinct.' A branching shrub 2-6 feet high. Flowers pale purple. 



Datura meteloides, DG. MSS. ; Dunal^ I. c. p. 544. Western Texas, Chihuahua, Sonora, 

 and other Mexican States ; common.* (No. 1606, JVright.) 



*** This fine Datura, which has all the appearance of being indigenous in New Mexico and the adjacent provinces of Mexico, 

 must be the D meteloides named by De Candolle, and described by Duna! in the Prodromus from one of the drawings by 

 Mocino and Sesse. But the distinctions between it and D. Metel are not well stated ; nor did Dunal himself identify the specie 

 in the specimens from Berlandier's collection, No. 9156, gathered at Victoria, Tamaulipas, but referred them to D. Metel, 

 and, in consequence, Alphonse De Candolle, in the Geographic Botanique^ 2, p. 735, allows them to have considerable weight in 

 favor of the American origin of D Metel. The only reason for doubting our New Mexican plant to be De Candolle 's D. mete- 

 loides is, that Dunal described it as having a ' corolla 10-dentata,' which our plant has not. But the slight folds answering to 

 the sinuses may have been exaggerated and misunderstood. From seeds gathered by Mr. Wright this species has been culti- 

 vated in the Cambridge Botanic Garden for several years, for the past two years by the side of Datura Metel. The leading 

 diagnostic characters of the two may be expressed, as follows : 



'* D. Metel, Linn : viscidulo-pubescens ; eaule subvilloso ; corollse tubo ultra calycem sensim modice dilatato, limbo 10- 

 dentata ; basi calycis persistente subcapsula ampla. 



** D. METELOIDES, DC: pruinoso-glaucescens, vix puberula ; flore suaveolente ; corolla supra calycem cylindricum v^^Ide 

 dilatata, lirabo eximie 5-dentato ; basi calycis subcapsula persistente angusta ; ifaliis integerrimis. 



** D. meteloides, although with us a lower plant than D. Metel, is more showy ; its corollas (tinged with bluish purp'e) are 

 more dilated-funnelform and larger, measuring 5 or 6 inches in diameter of the limb, and often 8 inches in length ; and what 

 may be called the limb is on each side equal in length to the part of the tube which projects beyond the calyx. In D. Metel 

 the throat is much narrower, and the limb proportionally smaller, say 4 or 4| inches in diameter. In D. meteloides there are 

 no teeth or projections whatever at the sinuses of the corolla, nor does the slight plaiting there give the appearance of teeth ; but 

 the five proper teeth are very salient, narrowly subulate, and half an inch in length. The capsule is nearly glabrous, and with 

 shorter prickles than the cultivated D. Met^jl. but otherwise similar, as are the seeds ; the persistent and reflexed base of the 

 calyx, howeverj is much smaller. The herbage has somewhat of the disagreeable odor of D. Metel, but the flowers are sweet- 

 Bcented." .3. Gray, 





\ 



i 



-t 



5 



-1 



h 1 

 I 



i 



Pr :! 



-^ 



n 



--._JZ 



•-^■— 



