66 PROCEEDINGS OF THE AMERICAN ACADEMY 



The species of the Atlantic States having akenes fusiform-attenuate 

 at summit, and also marked by thyrsoid-paniculate inflorescence, through 

 most of which the main stem is continued, are only two, viz.: 1. // 

 .Gronovii, L., as to the plant of Clayton and Gronovius, Flora Vir- 

 ginica, whence the name. The synonymy of this was mainly worked 

 out in Torrey & Gray's Flora: but the synonym of Plukenet above 

 referred to is to be excluded, and probably all that relates to H. Mari- 

 anum, Willd. But it evidently is the H. Marianum of Fries with " an- 

 thela thyrsoidea," &c., although the phrase " achenia sursum leviter 

 attenuata " does not so well apply to akenes the upward attenuation 

 of which is conspicuous. 2. H. longipilum, Torr., the earliest name, 

 first published without a character, and not to be superseded by H. 

 barbatum, Nutt., as Tausch preoccupied that name. Var. spathulatum 

 of this species, as we hesitatingly regard it, is a naked-stemmed form, 

 which was collected by Professors Porter and Traill Green, on Tuscarora 

 Mountain, in the Alleghanies of Pennsylvania, and provisionally named 

 Pilosella spathulata by Schultz in Flora, 1862, The specimens are 

 too young for satisfactory determination. 



2. Rochj- Mountain and Pacific Species. — These, now considerably 

 increased in number, may be exhibited synoptically, as follows : — 



* Crinitely barbate or shaggy up to the heads, or even on the involucre, 

 with long and whitish hairs : akenes columnar, not at all narrowed 

 at summit : leaves entire. 



H. ScouLERi, Hook. — Montana and Mountains of Utah to Brit. 

 Columbia and Oregon. The Pennsylvanian plant taken for it by 

 Hooker, in Flora Bor.-Am., must have been the hirsute form of H. 

 Gronovii. See, in respect to this species, H. cynoglossoides. 



H. HORRIDUM, Fries, Epicr. 154. H. Brcweri, Gray, Proc. Am. 

 Acad. vi. 553, &c. H. reliciniim, Fries, 1. c, from Bridges's collection, 

 is probably the same species. — Sierra Nevada, California. The name 

 given by Fries is the earlier, but is not very appropriate. 



* * Crinitely very long-villous with black or dusky glandless wool on 

 the head and peduncles, more or less naked below : heads solitary 

 or few. 



H. TRiSTE, Cham, in herb. Willd., &c. — Aleutian Islands. 



* * * Dark-hirsute and somewhat glandular about the heads, also 

 some whitish stellular tomentum on involucre and peduncles: leaves 

 and lower part of the stem glabrous or at most puberulent : alpine. 

 H. GRACiLK, Hook. H. arcticum, Frocl. in DC, by the character 



is clearly of this species. H. trisle, in part, Torr. & Gray, Fl. ii. 478. 



