﻿PLANTS FENDLERIAN.E. 47 



strongly tetraquetrous, when immature fusiform, but at maturity abruptly contracted into 

 a slender stipe about two lines in length. 



f233. G. biennis, Linn. Bottom land, Kansas River ; August. 



f234. G. parviflora, Dougl. in Hook. Fl. Bor.-Am. I. p. 208. Council Grove to 

 Mora River, in low prairies and bottoms. 



f235. Stenosiphon virgatus, Spach, Mon. Onagr. p. 64. Prairies, Kansas River; 

 September. Plant 4 to 5 feet high. 



f236. Ludwigia palustris, Ell. Sic. 1. p. 214. Bluff Creek, near Council Grove : 

 September. 



f 237. L. alternifolia, Linn. Kansas River ; August. 

 238. Hippuris vulgaris, Linn. Ponds, Santa Fe ; May, June ; in flower. 



LOASACE^E. 



f239. Mentzelia oligosperma, Nult. in Bot. Mag. t. 1760. (M. aurea, Nutt. Gen.) 

 Council Grove, on hills between rocks ; August. 



^ 240. M. (Bartonia) ornata, Ton: &• Gray, Fl. 1. p. 534. — Between the Rio 

 Colorado (Upper Canadian) and Rock Creek ; Aug. Petals, as in the fine specimens 

 gathered by Fremont, &c, 2? inches long ; the stamens nearly 2 inches long and all fili- 

 form. — I have never seen this species alive, nor does Mr. Fendler record the color of the 

 flowers ; but Mr. Sprague, who observed it on the Missouri, confirms the uniform state- 

 ment that the flowers are white, at most yellowish-white, and expand at sunset. I have 

 raised the nearly allied M. nuda from seed, the flowers of which are said by Nuttall to be 

 " of the same color " as those of M. ornata ; and I observed the ivhite corolla uniform- 

 ly to open an hour or half an hour before sunset, and to remain expanded through the 

 evening. On the other hand, the M. laevicaulis of the interior of Oregon has yellow 

 blossoms, which never expand in the evening, but during bright sunshine, according to 

 Douglas : they are " pale yellow," according to Mr. Breckenridge : " they open during 

 sunny hours, and are of a lurid golden-yellow," according to Mr. Geyer. There is also 

 an evident difference in the foliage, and in the foliose bracts, which are sparing in M. 

 laevicaulis ; the latter has but five petals and five dilated filaments ; and although, indeed, 

 Dr. Torrey assures me that these are sometimes replaced by five additional petals, still I 

 cannot think that M. laevicaulis should be merged in M. ornata, as has recently been done 

 on the high authority of Sir Wm. Hooker. 



<S 241. M. (Bartonia) nuda, Ton. fr Gray, I. c. McXees Creek, and Pawnee Fork 

 of the Arkansas ; Aug. to Sept. — This species extends to Texas, on the Cibolo and 

 Pierdenales, whence it has been sent by Lindheimer, along with seeds from which I have 



