70 PROCEEDINGS OF THE AMERICAN ACADEMY 



beset with villous-setiform hairs : leaves entire, the upper narrowly 

 lanceolate to linear: heads scattered in a corymbiform or irregular 

 panicle: involucre campanulate, 4 or 5 lines high, pale, 15-20-flowerod, 

 of narrow lanceolate bracts: corollas light rose-color, — Mountains of 

 New Mexico, Greene. Also collected long ago by Bigelow or Wright, 

 too young. Huachuca Mountains, S. Arizona, Lemmon. 



H. Lemmoni, Gray. Villose- or hirsute-setose up to the racemiform 

 close th)rsus : stem simple, 2 feet high or more, very leafy : leaves 

 lanceolate-oblong, denticulate with callous or glanduliir teetli ; cauline 

 partly clasping, acute ; lowest oblong-spatulate, 4 to 7 inches long, 

 tapering into winged petioles : heads (4 lines high) numerous in the 

 oblong thyrsus, 12-20-flowered : involucre glabrous or nearly so, not 

 glandular, not longer than the cauescent-puberulent peduncles ; its 

 principal bracts narrowly linear, greenish-livid, obtuse : corollas short, 

 seemingly white : akenes hardly 2 lines long, slender, obscurely if at 

 all narrowed upward when mature, but manifestly so when younger : 

 pappus not very copious, bright white. — Cave Caiion, near Fort 

 Iluacliuca, S. Arizona, Lemmon. A species of Mexican type, belong- 

 ing to the Thyrsoidea of Fries. 



The following are Mexican species : — 



H. ABSCISSUM, Less., — a Mexican species which we with probability 

 identify, and conjecture to include H. thyrsoideum, Fries, a species of 

 the same group with H. Lemmoni, — is said by Fries (Epicrisis, 150) 

 to come from " Texas, ad Mulpays de la Joyas," wherever that may be, 

 and from " Alabama, Hooker." About which there may be some mis- 

 take ; for nothing from Alabama uuder this name is found in the 

 Ilookerian herbarium. 



H. Mkxicanum, Less, in Linna^a, v. 133, probably includes all the 

 Intyhiformia of Fries, Epicrisis, except H. abscissum. It is in Schaff- 

 ner, Gregg, Galeotti, and Ghiesbreght's collections. Palmer's 757 

 (which probably had a white pappus, somewhat discolored in drying), 

 and Parry «fe Palmer's 552, 553, and even 551 (which is probably 

 //. niveopappum, Fries), belong to it; and 384 of Bourgeau is very 

 nearly the form named by Schultz H. prcemorsiforme. 



H. CREPiDiSPEUMUM, Fries, Symb. 14G, probably includes Palmer's 

 758, from the Sierra Madre, south of Saltillo ; the flowers of wliich 

 are said to be white. The pappus is white, and the akenes taper from 

 near the base to the summit, but not very much. 



Troximon alpestre. Eutroximon., nanum, gl.ihrum ; caudice 

 elono-ato; foliis spathulatis sen lanceolatis j)innato-iiicisis partitisve ; 

 Bcapo 2-3-pollicari debili ; involucri bracteis fere T. cuspidati sed pau- 



