V I L A C E M. 93 



the present genus is distinguished by its entirely separate stamens, with 

 narrow filaments and normal anthers, destitute of any prolongation of 

 the connective, and by the unilateral stigma, which, in & flower otherwise 

 perfectly regular, vindicates its relationship with the genuine Violece. 

 In allusion to the regular flowers and arborescent habit, I have com- 

 pounded the name of the genus from i'sos, equal, SivSfiv, tree, and hv ? the 

 Violet, 



1. ISODENDRION PYEIFOLIUM, Sp. Nov. (Tab. 8.) 



I. folik membranaceis ovalibus seu ovato-ellipticis crenato-serrulatis petto- 

 latis, jurdoribitB subtus ramulisque p)ubescentibus ; stipulis sepcdisque 

 dorso sericeis margine late scariosis ; floribus pendulw, 



Hab, Wooded portion of the Kaala Mountains, Oahu, Sandwich 

 Islands. 



A branching shrub, about 6 feet high ; the branches rather slender, 

 glabrous, except the younger, which are a little pubescent, beset with 

 the persistent stipules, which remain long after the leaves have fallen. 

 Leaves alternate, approximate at the summit of the branches, membra- 

 naceous in texture, ovate-elliptical or oval, obtuse or rounded at both 

 ends, li to 2 inches long, loosely pinnately veined, crenate or minutely 

 serrate, with small and glandular-tipped teeth, glabrous, or the lower 

 surface minutely pubescent when young, as are the petioles (3 to 5 

 lines long). Stipules geminate, triangular, acute or acuminate, ob- 

 lique, squamaceous or scarious, carinate with a very strong and thick 

 midrib which is minutely silky-pubescent externally, ciliolate on the 

 margins, a line and a half long ; the two partly overlying each other 

 in the axil of the petiole, as if intrapetiolar, close-pressed to the 

 axis, somewhat imbricated at the summit of the branchlets, more 

 remote on the larger branches, persistent, or at length wearing away. 

 Flowers solitary and axillary, developed with the leaves. Pedicels 

 recurved, 2 or 3 lines long, scarcely as long as the flower, minutely 

 pubescent, bibracteolate in the middle; the bracts opposite, resembling 

 the stipules. Calyx of 5 equal and nearly distinct sepals, which are 

 ovate and acute, not at all produced at the base, of a texture and form 

 nearly the same as the stipules, somewhat carinate and minutely silhy- 



24 



