508 PROCEEDINGS OF THE AMERICAN ACADEMY. 



species of later date. At all events, it is highly inexpedient to per- 

 mit the existence of imperfectly described plants to block the advance 

 of classification in the groups concerned, and, while anxious to give 

 proper recognition to all the more careful work of Schultz and others, 

 we have no hesitation in frankly relegating their less intelligible siDCcios, 

 for the present, to that limbo of dubice which must long be appended to 

 several of the larger genera of the Verhesinece. 



In citing specimens, literature, and synonymy, the writers have aimed 

 to supplement rather than to repeat what can be readily found in the 

 Synoptical Flora, Biologia Centrali-Americana, Flora Brasiliensis, or 

 Index Kewensis. Species of which no specimens have been seen during 

 these revisions are marked by an asterisk (*). The writers are grateful 

 to Mr. F. V. Coville and Dr. J. N. Rose for the loan of the genus Mon- 

 tanoa from the U. S. National Museum, and to Miss Mary A. Day for 

 the verification of references and other bibliographical assistance. 



MONTANOA, Llav. &, Lex. Heads (except in one species) hetero- 

 gamous with neutral ligulate uniseriate ray-flowers and few to many per- 

 fect dif^k-flowers (the inner sometimes sterile). Involucre subcylindric to 

 hemispherical, its bracts mostly narrow, 1-2-seriate, linear- to lance-ob- 

 long, rarely spatulate. Pales keeled, folded about the achenes, papery to 

 subcartilaginous, attenuate or abruptly narrowed to an acute and often 

 spinescent tip, persistent, accrescent, and more or less squarrose in fruit, 

 always somewhat villous (densely so in the first subgenus), but sometimes 

 quite glabrate ; receptacle conical. Ligules spreading, usually oblong and 

 emarginate at the end, without styles ; achenes of the ray-flowers abor- 

 tive, empty, pappusless. Disk-flowers regular, tubular, 5-toothed ; proper 

 tube slender, throat campanulate, and nerveless teeth ovate, acute. 

 Style-branches slightly thickened upwards and appendaged with a short 

 or slender acumination ; achenes thickish, laterally compressed, rela- 

 tively short, obovate ; pappus none. — Pithy-stemmed shrubs, sometimes 

 arborescent, with opposite serrate, dentate, or often lobed leaves, and 

 white or purplish corymbose heads. — Nov. Veg. Desc. ii. 11 (1825); 

 Sch. Bip. in Koch, Wochenschr. vii. 406-408 ; Benth. & Hook. f. Gen. 

 ii. 364; Hemsl. Biol. Cent.-Am. Bot. ii. 164; HofFm. in Engl. & Prantl, 

 Nat. Pflanzenf. iv. Ab. 5, 232. Eriocarpha, Cass. Diet. Sci. Nat. lix. 

 236 (1829). Eriocoma, HBK. Nov. Gen. & Spec. iv. 2Q7, t. 396 

 (1820). Montagncea, DC. Prodr. v. 564 (1836). — An exclusively 

 neontogenous and very natural group of 32 distinct species, extend- 

 ing from Northern Mexico to Panama, with outlying species as far 



