210 PROCEEDINGS OF THE AMERICAN ACADEMY. 
patentem abrupte contractis.—Tufa bluffs near Tehuacan, Puebla, 
Mexico, 1680 m. altitude, 7 August, 1901, C. G. Pringle, no. 8585 
(type, in Gray Herb.) ; in the vicinity of San Luis Tultitlanapa, Puebla, 
near Oaxaca, August, 1908, C. A. Purpus, no. 3105 (Gray Herb.) and 
no. 3104 (Gray Herb.). The last-mentioned specimen has the upper 
leaves closely sessile instead of being provided with the usual very short 
wingless petioles beneath the auricles, but the plant is otherwise so 
closely identical that it must be inferred that this variation is merely 
formal and trifling. The affinity of the species is clearly with M. 
Pringlei Robinson & Greenman, Proc. Am. Acad. xxxiv. 512 (1899), 
which, however, has leaves of quite a different type of serration and the 
involucral bracts of a peculiar obovate-spatulate form. 
IDESMIA SQUARROSA Klatt, Bull. Herb. Boiss. iv. 479, t. 7 (1896). 
This species, the type of a newly distinguished as yet monotypic genus, 
was founded upon a plant collected in dry places at Caimanera, Cuba, 
by von Eggers, May, 1889 (no. 5439). Dr. Klatt was inclined to regard 
his genus as being of the Hupatorieae Ageratinae and very nearly re- 
lated to Aschenbornia. Hoffmann in Engl. & Prantl, Nat. Pflanzenf. 
Nachtr. 321, 322 places Lepidesmia next Ageratum and distinguishes 
it from that genus chiefly by the more imbricated involucral scales. 
However, even a cursory inspection of the type of Lepidesmza, as repre- 
sented by fragments in the herbarium of the late Dr. Klatt, led the ° 
writer to believe that the plant could not belong among the Hupatorieae, 
and a careful dissection has shown that the style-branches, instead of 
having the clavate unappendaged form found in the Hupatorieae, are 
divided into a basal rather short thickish and somewhat compressed 
portion surmounted by a rather elongated attenuate and papillose ap- 
pendage in the manner of many Heliantheae. In fact, it seems proba- 
ble that the genus should be placed near Jsocarpha R. Br. In habit, 
as well as in technical characters, it is not very unlike ZL oppo- 
sitifolia R. Br., which also possesses opposite leaves, which are lan- 
ceolate and subsessile, glomerate heads with subscarious involucre and 
chaffy receptacle. However, the distinct pappus, much smaller h 
and flattish receptacle furnish ample generic distinctions. 
IosTEPHANE TRILOBATA Hemsl. Biol. Cent.-Am. Bot. ii. 169 (1881). 
With this species the following appear to be identical : Rudbeckia 
chrygantha (Sch. Bip.) Klatt, Leopoldina, xxiii. 143 (1887), page 3 of 
reprint, and Echinacea chrysantha Sch. Bip. ace. to Klatt, 1. ¢. (1887), 
page 4 of reprint. The species of Schultz Bipontinus seems never to 
have been described until taken up and transferred to Rudbeckia by 
Klatt. It rested upon Liebmann’s no. 575, collected at Cubre de 
Estepa, Mexico. In the herbarium of the late Dr. Klatt, a collection 
