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MEMpIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



alt. 1800-1950 m; 16 Dec 1950, Maguire, Cowan, & Wurdack 30263 (NY); 

 Cerro Huachamacari, southeast escarpment ; common in marshy scrub savanna ; 

 alt. 1900 m; 11 Dec 1950, Maguire, Cowan, & Wurdack 30142 (NY); Cerro 

 Huachamacari, Rio Cunucunuma ; common on East Ridge ; alt. 1800 m ; shrub 

 to 1 m; fruit reddish; 11 Dec 1950, Maguire, Cowan, & Wurdack 30129 (NY) ; 

 Cerro Sipapo (Paraque) ; frequent near Camp Savanna; alt. 1500 m; 6 Dec 1948, 

 Maguire & Politi 27541 (NY) ; Cerro Sipapo (Paraque) ; 25 Jan 1949, Maguire 

 & Politi 28582 (NY) ; Cerro Sipapo (Paraque) ; frequent near Camp Savanna ; 

 alt. 1500 m; 19 Jan 1949, Maguire & Politi 28449 (NY) ; Cerro Sipapo (Par- 

 aque) ; between Savanna Camp and West Peak; alt, 1500-1800 m; 20 Dec 1948, 

 Maguire d: Politi 27801 (NY) ; Cerro Paraque; alt, 1600 m; Feb 1946, K. Phelps 

 11 (VEN) ; same locality and date, K. Phelps 28 (VEN). 



In Maguireothamnus tatei var. tatei the leaves are more cuneate and narrowed 

 at the base and often more revolute than in var. latifolius. The leaf-blades are 

 also generally narrower. Despite the fact that Chalepophyllum tatei was pub- 

 lished on one page (p. 380) later than C. latifolium (p. 379), the present rules 

 of International Nomenclature do not require strict page priority and permit 

 the botanist to select the name for one taxon of a particular group, provided 

 those names are published simultaneously, as in the present case. Since the 

 variation represented by M. tatei var. tatei is the commoner and more prevalent 

 type, and, therefore, biologically more widespread variation of the group, I have 

 selected M. tatei as the nomenclatural as well as the taxonomic type of the group 

 to which M. tatei belongs. 



The plants of Cerro Duida and Cerro Huachamacari in general have leaf- 

 blades which are more revolute, narrower, and often more narrowed at the base, 

 with a lance-elliptic to elliptic-oblong shape, and 3.5-9 mm broad. This is some- 

 what in contrast to the plants of Cerro Sipapo (Paraque) in which the leaf- 

 blades are plane to only slightly revolute, averaging broader, elliptic-oblong to 

 oblanceolate-oblong, and 7-17 mm broad. However, these variations merge into 

 one another imperceptibly, with resulting intergradation and non-correlation. 

 Although the tendency to broader, less revolute leaves is shown by the Cerro 

 Sipapo material, it is believed justifiable to allow the variation to exist as such 

 under M. tatei var. tatei. 



2b. Maguireothamnus tatei var. latifolius (Standi.) Steyermark, comb, now 



Chalepophyllum latifolium Standi. Field Mus. Bot. Ser. 7: 379. 1931. 



Distribution. Summit of Cerro Duida, Territorio Federal Amazonas, south- 

 western Venezuela. 



VENEZUELA. Amazonas : Mount Duida, summit ; moist slopes of Savanna 

 Hills; alt. 1330 m; bush; Aug 1928-April 1929, G. H. H. Tate 730 (holotype of 

 Chalepophyllum latifolium, NY); Cerro Duida, summit; Savanna Hills; alt. 

 1025-1200 m ; shrub 5 ft tall ; leaves subeoriaceous, deep green above, pale green 

 below; corolla white, fragrant; 2 Sep 1944, Steyermark 58240 (F, NY, VEN) ; 

 Cerro Duida, Rio Cunucunuma ; open scrub on north slopes and ridges of Cano 

 Negro basin ; alt. 2000-2300 m ; wandlike shrub 1-1.5 m ; leaves coriaceous ; 23 Nov 

 1950, Maguire, Cowan, & Wurdack 29695 (NY). 



This taxon represents the broadest-leaved variation of the M. tatei group. 

 However, some of the broader-leaved variations found on Cerro Sipapo (Paraque) 

 approach it both in leaf-shape and width. With respect to characters of the 

 stipules, calyx, corolla, fruit, and seeds, this broad-leaved taxon cannot be dis- 



