ROBINSON & GREENMAN: CONTRIB. GRAY HERBARIUM. 105 
2. SUPPLEMENTARY NOTES UPON CALEA, TRIDAX, 
AND MIKANIA. 
‘SoME years ago the writers (Proc. Amer. acad., 32, 1-30) pub- 
lished revisions of the genera Calea, Tridax, and Mikania. These 
Synopses were based chiefly upon the representation of the genera 
in the Gray herbarium, and considerable difficulty was naturally 
experienced in the exact placing of some of the species of European 
writers whose types were not readily available for examination. 
The recent acquisition of the Klatt collection by the Gray herba- 
rium does much to remove these difficulties and puts the writers 
in a position to add the following corrections and supplementary 
notes upon their former revision. 
CALEA PEDUNCULARIS, var. LONGIFOLIA, Gray. Dr. Rose’s no. 
2730, from the Sierra de los Morones, near Plateado in the State 
of Zacatecas, corresponds closely with Calea peduncularis, var. 
longifolia, Gray, but has pappus, thus showing that the achenes 
of this variety are no more constant in regard to pappus than those 
of the more typical forms of the species. The variety is, however, 
readily distinguished by its long leaves. 
a C. perrorata, Klatt, Leopoldina, 20, 95, has immature heads 
but is otherwise like Fendler’s no. 637 (from Tovar, Venezuela) 
which was relegated without question by Schultz Bipontinus to C. 
solidaginea, HBK. On comparing Dr. Klatt’s type (coll. on the 
Mayquetea River by Edw. Otto, no. 459) with Kunth’s description 
and plate (HBK., Nov. gen. et spec., 4, 295, t. 407) we can find no 
significant difference. 
C. pensirtora, Klatt, Leopoldina, 20, 96, is Ageratum cony- 
zoides, 
C. pentuctipinervi, Klatt, Bull. soc. bot. Belg., 31, 207, is not 
to be satisfactorily distinguished from C. axillaris, DC. 
C. axintaris, DC. To this species should also be referred C, 
prunifolia, Klatt, }. ¢., 208, in part (as to Pittier’s nos, 3219, 3695, 
4520, 4938, and 7023), not HBK. The distinctions between C. 
axillaris and its variety urticuefolia seem to be scarcely worthy of 
recognition. 
C. pittieri sp.n. Shrub with slender flexuous terete puberu- 
lent or toward the end tomentulose branches: leaves ovate to 
elliptic, thickish, crenate-serrate, acutish, 4.5 to 7.5 cm. long, 2.5 
