412 PROCEEDINGS OP THE AMERICAN ACADEMY. 



bracteis involucri exterioris ca. 4 elliptico-lanceolatis alternis acumi- 

 natis ca. 12 mm. longis tenuibus foliis similibus; squamis involucri 

 proprii 8 lauceolati-linearibus attenuatis ca. 14 mm. longis dorso glan- 

 duloso-puberulis medio herbaceis margine subscareosis demum stellato- 

 patentibus divaricatis apice falcatis ; corollis ca. 1 cm. longis laete 

 flavis ; achaeniis 5 mm. longis columnaribus papilloso-setulosis ; pappi 

 setis albo-fulvescentibus ca. 9 mm. longis. — Guatemala : along river, 

 alt. 230 m., Zacapa, 19 June, 1909, Charles C. Deam, no. 6359 (type, 

 in Gray Herb.). Tbis sbrub differs from such related species as 

 T. megalophylla Greenman, T. silvatica Robinson & Greenman, T. Nel- 

 son ii Greenman, and T. rugulosa Robinson & Greenman, in its much 

 thinner, flatter, softer, and essentially entire leaves of rhombic-obovate 

 form. From T. frutescens P. Browne and its relatives the present 

 plant is readily distinguished by its larger outer involucre, the silky 

 under surface of its leaves, etc. 



Chaptalia semifloscularis (Walt.), n. comb. Perdicium semiflos- 

 culare Walt., Fl. Car. 204 (1788). Chaptalia tomentosa Vent. Desc. 

 Jard. Gels, t. 61 (1800). Tussilago integrifolia Willd. Sp. PI. iii. 

 1964 (1804). Gerb&ra Walt&ri, Sch. Bip. in Seem. Voy. Herald. 313 

 (1856). Thyrsanthema semijlosculare (Walt.) Ktze. Rev. Gen. i. 369 

 (1891). 



III. AMERICAN FORMS OF LYCOPODIUM 

 COMPLANATUM. 



By C. A. Weatherby. 



Lycopodium complanatum L. occurs in the western hemisphere in 

 two distinct and geographically isolated areas. In the north, it 

 ranges from Newfoundland to Alaska, and southward to northern 

 Idaho and (in its variety fiabelliforme) to the mountains of North 

 Carolina. It is apparently entirely absent from the United States 

 south of these points ; but it reappears in south-central Mexico and 

 extends thence through Central America to Bolivia and southern 

 Brazil. It has also been reported from the West Indies. Specimens 

 from these areas show, on examination, four more or less well-marked 

 variant tendencies — two (one with a subsidiary variation) in the 

 north, and in the south, two others, separable from each other and 

 from both of the northern forms. 



The northern forms have been clearly distinguished by Prof. Fer- 

 nald. 1 The two southern (one chiefly Mexican, the other chiefly 



— , i 



1 Rhodora, iii. 2S0 (1901). 



