NATURAL SCIENCES OF PHILADELPHIA. GO 



grounds." Stemlef an 1 poljcephaloua : at least my specimen Las four head 

 nearly Bes! i on the crown, of equal size with those of the European plant, 

 with which the specimens very well agree, except that the exterior scales of 

 the involucre are all tipped with a manifest ine. Some of the leaves are 

 barely sinuate, as in the common Siberian jcariety ; others are nearly as 

 deeply pinnatifid as in the European plant. /34Q)c. BDT/LE, Nutt. so named 

 in Parr ier collection : but very probabTyiiot tl 3. In the lack 



of certain original materials, and of a complete re-examination, I could not 

 pretend to n; ie the Thistles of the Rocky Mountains, Oregon, fcc, and am not 

 disposed to add to the existing confusion. 341- C. "a white- flowered spe- 

 cie " between the last and C. osum, (Hook.) DC, if Bourgeau's plant 

 from the Saskatohawan is rightly named.* 



343 . C. Diu'MMoXDii, Torr. and Gr. Caulescent and leafy-stemmed, the ex- 

 terior flowers having a sparingly plumose pappus : certainly very near C. 

 pumi 1. 34± Echhtais carusoides, Cass., var. nutans, DC. " Mountains, 

 at middle elevations, and subalpine 5 and infertile, open valleys of Middle 



Park, where it is very common, and certainly indigenous. " I have a specimen 

 of this collected by Mr. Samuels in California, which I had thought probably 

 an introduced plant. But it would appear to be truly American as well as 

 Asiatic. The specimens accord with Schrank's and with De Candolle's figures 

 of the Caucasian and Himalayan plant, although, perhaps, the appendage 

 of the involucrai scales are a little more dilated. 



344. Mri indium ruLcriEr.LrM, Nutt. 345. Lygodfsmta Juncba, Don. 340". 

 STErHAN<»>w;KiA incixata, Nutt* 347. Lyg mia JUKCEA, var. ? rostrata".} 

 "On the plains ; Sept. ; rare." 348. Crepes SUNCnrATA, Torr. and Gr. 340 . 

 Hie r this ;e, "Willd. 350. H. albiflqkum. Hook. t€ Subalpine, west of 

 the range; rare."t 3" 1. Nabalus racemosus, Hook. "South Park; tare;" 



a low form. 352. See above, p. 66. 353. Crepis occidentals, Nutt. The 

 same as Parry's 70, omitted accidentally. 354. Troximum olai-coi, Nutt., 

 var. foli dilatatis laciniato-pinnatifidis. segment lanceolato-attenuatis. Evi- 

 dently a form of Parry's 65. Mr. Hall notes that it u flowers in May and the 

 early part of June, on low mountains," and must be different from the next, 

 which flowers two months later in the same localities. 355. Macrorhyxchcs 

 troxemoides, Torr. andGr. (Troximon attrantiacum, Hook.) ; in a great variety 

 of forms, large and small, from a foot and a half to as many inches in 

 height, with entire, toothed, or laciniate-pannatifid lea\ : the size of the 

 hea iually variable, and with yellow, orange, chocolate-colored or purple 

 corol -. "Very variable at all heights, even alpine; flowers in July and 

 August." The full suit of specimens show that to this clearly 1 ilongs Tr - 

 imon and T m roseum, Nutt., and Mi rorhynchus \ >t$, Gray, PL 



Fendl. The fruit, when well developed, is re rate, with a beak of about 

 equal length with the body of the the achenium. 356. Tj simon olai 

 Nutt., var. da fcephalum, Torr. and Gr. (7*. / acifi m. Watt.) "High 

 alpine s< mingly different from any of the above." It is also 424 of Parry's 

 separate collection, from Berthoud's Pass. 3"»7. Taraxacum mohtakcm, 



\rh 



It 



remarkab for the 1 of; w fi >w< - ing crowded into a capitate clusti. ■■>■_ as a man' j 



fist, toli se-iii with very spinoae bra and clothed with h I \ ft, implexed 



perhaps tl foot or two in height, rery leafy : the lea v< *r, canescent 



beneath, piunati the lobes very short and ■ r wded, armed with Blender spines. 



fL >D£8MJA JUBCEA, Don^ Tar. KOsteata: acbeniia apice i ttrato-attenuatia ; capituli- -repe * 

 S-U-H §; i august im<' HneariUis elongatis (in hi sp im. S-i-poliicaribns). Head* * 



rather lar r than usnal in L.j> ; achenm half an in. h long, t tapering apex directly con- 



tradict ric character * k not contracted at the apex. >ere they may be said to be beaked. 



Dr. Hay< i collected the ganie form on the Laramie Mountains. The species ail need to be de- 

 fined anew. 



I To t bel ngs Parry's Xo. 71 cf the 1S62 collection. 



1863.] 



