48 PROCEEDINGS OF THE AMERICAN ACADEMY 



pubescence, almost tomentose. Pappus nearly of tlie preceding, about 

 five of the inner bristles stronger and more aristiform. 



Pectis klongata, IIBK. 1. c, t. 392, a common Soutli American 

 species, is not known from Mexico. 



Of Western Central America, P. tenuifolia and P. suhsquarrosa 

 (names by Schultz in transferring from Lorentea) are of this group. 



The West Indian P. Cubensis, Grisebach, is of this section, with 

 babit somewhat of P. humifusa, and the stouter inner bristles of the 

 pappus slightly broadened downward. 



Pectidiuji. The four species here associated are P. Coulteri, Gray, 

 of Arizona, and P. multtseta, Benth., of Lower California, forming sec- 

 tion I/eteropeciis, Gray, PL Wright., — low annuals, peculiar for having 

 the corneous pappus awns retrorsely barbed in the way of Bidens, — 

 P. punctcda, Jacq. {Pectidiiun, T)C.), annual, with smooth corneous 

 awns, and leaves almost destitute of seta3, — and P. imherbis, Gray, 

 a rather tall Arizonian perennial, with do seta3 to the leaves, rigid 

 and paleaceous smooth awns and 2 or 3 short rigid palea), the awns 

 not rarely obsolete. The two latter accord well in habit. 



Anthemidece. 



Aktemisia Klotzschiana, Bess. Revis. Artem. herb. Berol. in 

 Linnaja, xv. 107, is the name of the Mexican spcjcies left unnamed by 

 Ilemsley, Bot. Biol. Centr.-Am. ii. 231. Coll. Sc/iajfncr, 275; Parri/ 

 & Palme?', 528, 529, both from San Luis Potosi. Besser described 

 only an incomplete specimen, collected by Schiede, the heads destitute 

 of flowers. As Besser states, it is an annual species, with leaves dis- 

 sected into small filiform lobes. It belongs to the Abrotanum section, 

 and the small heads are many-flowered, ripening immerous akenes. 



The following are additions to the North American species : — 



Artemisia Wuigiitii. Abi'otanum, microcephala, i)ube minuta 

 cinerea vel canescens, pedale, foliosissima ; foliis in segmenta 5 vel 7 

 angustissime linearia mox revoluto-filiformia integerrima pinnatiparti- 

 tis ; panicula stricta virgata ; capitulis confcrtis ; involucro demum. 

 glabrato. — Plains of S. Colorado and New Mexico, Wright (no. 1279, 

 referred to in PI. Wrijjht. ii. 98, under the "forma tenuifolia" of ^. 

 Mexiccma), Greene, Palmer, Drandegee, and Rothroclc (no. 539), who 

 states that it is regarded as a peculiar species. 



Artemisia franserioides, E. L. Greene in Bull. Torrey Club, 

 X. 42. A robust species of the A. vrdgaris type, imperfect specimens 

 of which have been referred to A. discolor. It is essentially glabrous 

 throughout, for the coarsely 1-2-pinuately parted leaves, although 



