Monographs Details: Phyllanthus juglandifolius Willd.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Euphorbiaceae
Description:Distribution and Ecology - Greater Antilles and South America: Ecuador and Brazil; British Guiana; Venezuela (Bolivar). BRITISH GUIANA. Orealla savannah, Courantyne River, 3 Nov 1946, Field No 2608, Record No 5396 (NY); Brantwegt, R. B. Berbice R., 31 Jan 1951, Field No F. 3032, Record No 6362 (NY). VENE-ZUELA. Bolivar: low woods along ditch along highway between Tumeremo and El Dorado, 20 km N of El Dorado, 23 Jul 1960, Steyermark 86582 (NY, VEN).

Discussion:

P. grandifolius sensu Mull.-Arg. in DC., Prodr. 15(2): 329. 1866, et auct. non L.

Type. Herb. Willdenow (B), not seen.

The two British Guiana specimens have a cordate to subcordatc leaf base, whereas the Venezuelan Bolivar specimens’ leaf base is obtuse or rounded. The former therefore would match the description of P cornifolius H.B.K., the latter the description of P juglandifolius Willd. Whether or not this distinction deserves nomenclatural recognition cannot be decided at present based on the scanty material available. Webster’s thorough study (Jour. Arnold Arb. 37: 10. 1956) revealed that the name P grandifolius L. has been applied to P juglandifolius erroneously under the influence of Muller-Argoviensis’ first misapplication. Linnaeus’ name ought to be reserved for the Mexican species which on the other hand has been called erroneously P. glaucescens. P juglandifolius is characterized by dilated petaloid tips of the style and has a phyllanthoid branching, whereas the Mexican P grandifolius has no phyllan-thoid branching.

Distribution:Guyana South America| Venezuela South America|