OF ARTS AND SCIENCES. 373 



" Flowers creamy white," according to the discoverer's notes, but 

 sulphur-j'ellow in the dried specimens. 



Thiclksperiia subnudum, Gray, Proc. Am. Acad. x. 72. Speci- 

 mens collected in 1877, by Dr. Palmer, show that it commonly has ray- 

 fluwers, even of a very large size, that the akenes sometimes become 

 granular-tuberculate, and that the pappus may develope in the manner 

 of T. suhsimplicifolium. The species appears to hold distinct, but it 

 must have a new character and include T. simpUcifulium, var. sca- 

 posum. 



AcTiNELLA Brandegei, T. C. Porter. Ex affini A. (jrandi flora 

 insigiiiter differt tomento minus lanato parciore ; foliis simpliciter 3-5- 

 lobatis paucisve integris glabratis ; capitulis multo minoribus ebrac- 

 teatis ; involucri squamis lato-lanceolatis ; ligulis 12-16 (tantum 

 semipollicaribus) ; acheniis subturbinatis ; pappi paleis firmioribus 

 ovato-lanceolatis parum acuminatis corolla disci dimidio brevioribus. — 

 A. grandiflora, var. glabrata, T. C. Porter, Fl. Colorado, 76. — Sangre 

 de Cristo range of mountains and on Sierra Bhinca, S. Colorado, at 

 11,500 feet, &c., in the alpine region, Parry (1867, undeveloped), 

 Brandegee, Gray and Hooker. It was only in deference to my errone- 

 ous opinion that this species was omitted from publication, under the 

 above name in 1874, in Porter and Coulter's Flora of Colorado. The 

 species is abundantly different from A. grandiflora, and wholly replaces 

 it in the alpine districts of the southern part of Colorado. 



AcTiNELLA BIENNIS. A. Richardsonii proxima, multo major; radice 

 bienni ; caule l-2|-pedali; pedunculis monocephalis subpaniculatis ; 

 ligulis in maximis poUicem longis ; disco maturo semipollicem alto ; 

 receptaculo hemisphaerico et pappo A. Richardsonii. — S. Utah and 

 Arizona, INIokiak Pass south of St. George, Palmer (no. 260 of coll. 

 1877) ; Richfield, Utah, L. F. Ward in Powell's Exped. no. 175, &c. 

 Probably A. Richardsonii, var. canescens, Eaton in Watson, Bot. King; 

 but it is uncertain whether that has not the multicipital truly peren- 

 nial stock of A. Richardsonii. A. chrysanthemoides and A. odorata 

 (the latter found along our southern frontiers) are annual species, with 

 similar foliage, and A. anthemoides, the original Hymenoxys of Cassini 

 (if rightly identified by Hooker and Arnott, as is wholly probable) is a 

 rayless Bonarian species much like A. odorata and with a similar 

 acutely conical receptacle.* 



* Tfiimenoxys of Cassini, and also of Bcntham and Hooker, would therefore 

 merge in ActineUa. The only cliaracter in the diagnosis to separate tliem is 

 that the receptaculum is said to be sometimes flat or convex in tlie former. 

 But altliough Kunth and Cassini describe H. chrysanthemoides as having "recep- 



