8 PROCEEDINGS OP THE AMERICAN ACADEMY 



Encelia stenopuylla, E. L. Greeue, is a simpler species, with 

 aristate akeues and liliform leaves, from Cedros Islands, Lower Cali- 

 fornia. 



Encelia halimifolia, Cav. Ic. iii. G, t. 210. This was raised 

 from seeds said to come from " Nova Ilispania," i. e. Mexico, and was 

 characterized by "calycibus ciliatis," that is, tlie involucre with " squa- 

 mulis ciliatis." Instead of this, DeCaudolle, in the Prodromus, has it 

 that the "leaves" are "margine valde ciliatis," which was probably a 

 slip, and as to habitat adds '' verosimiliter potius in Peruvia." Now 

 we have a specimen collected by Palmer on the Yaqui River, in the 

 Mexican province of Sonora, which accords well with the original 

 character and figure. E. conspersa, Beuth. Bot. Sulph., of Lower 

 California, from the description may be the same. 



The species of the section Simsia, chiefly Mexican, greatly need 

 revision. Hemsley, in the Biol. Centn-Amer. Bot., has enumerated 

 them from the books ; but they should be reduced and characterized 

 by some botanist having access to original specimens. Only three of 

 them occur in the United States ; viz. E. exaristata, Gray in Hemsl. 

 1. c, an annual species (which is S. lagascceformis of PI. AVright.), and 

 two nearly related perennials, E. suisakistata. Gray, 1. c, and E. 

 CALVA, the Barratlia calva of Gray & Engelm. E. exaristata is said 

 by Hemsley to be no. 3320 of Bourgeau's collection from Orizaba ; but 

 I have it only from S. W. Texas and Arizona, collected by Wright, 

 Thurber, and Lemmon. It is an annual with (so far as known) undi- 

 vided leaves and appendaged petioles, rather small or narrow heads, 

 an unequal involucre of lanceolate bracts, the inner minutely glandular, 

 rays few and not surpassing the disk; and very smooth and glabrous 

 akenes slightly emarginate at summit, the pappus wanting or minutely 

 biaristellate. 



Encelia Mexicana, Mart., a name taken up by Hemsley from 

 DeCandolle's mention, seems to be the best available name for the 

 most common and polymorphous Mexican species, and the one longest 

 known. It is Coreopsis fcetlda^ Cav., therefore Simsia ficifolia, Pers., 

 and Encelia fcetida, Hemsley, Simsia auriculala, DC, and probably 

 S. amplexicauh's, Pers., E. amplexicaiilis, Hemsley. It is also, with- 

 out much doubt, the Helianthus amplexicaidis, DC. Prodr. v. 589. 

 A slender form of it with undivided leaves and exappendiculate peti- 

 oles is Simsia Schajfiieri, Schultz Bip., which grows with the ordinary 

 state. A more robust form, also of Schaffner's collection, with large 

 undivided leaves and auriculate appendaged petioles, is Simsia cordata 

 of Schultz Bip., probably also of Cassini (^Ximinesia cordata, HBK., 



