Rutaeeae. 



barbigera, and the P. elliptica. All these form a marked group which can be 

 expressed by the name Pelea sp. c. apocarpa. 



Drake Del Castillo, in his " Illustrationes Florae Insularum Maris Pacifici," 

 united the genera Melicope and Pelea with Evodia. The latter genus differs, 

 however, from Pelea in the strictly tetramerous flowers, while the genus Pelea 

 has never less than eight stamens. Melicope again differs from Pelea in the im- 

 bricate petals. The writer has here adhered to the original classification, uphold- 

 ing the genus Pelea, as has also been done by Engler in his treatise on the family 

 Rutaeeae. 



KEY TO SPECIES. 



I. Verticillifoliae. 



CapHule syncarpous the carpels more or less united. 

 Flowers fasciculate on a short axis. 

 Leaves quaternate or ternate. 

 Capsule deeply parted, small. 



Leaves obovate, shortly petiolate, capsule woody, small. 



P. clusiaefolia 

 Leaves large obovate-oblong, attenuate at the base, subsessile, 



flowers small P. Cookeana 



Leaves ovate, small, 2 to 5 cm, subsessile .... P. Fauriei 

 Leaves large, elongate oblong, spathulate, villous underneath 



P. sapotaefolia 



Leaves lanceolate-acute capsule thin P. Waialealae 



Leaves sessile with an auriculate base P. auriculaef olia 



Leaves ternate, obovate, petiolate, the midrib pubescent, cap- 

 sule very small P. microcarpa 



II. Megacarpae. 



Capsules large, deeply 4 parted. 



Leaves opposite branches hirsute — tomentose. 



Leaves oval, hirsute underneath P. volcanica 



Leaves oval or oblong, strongly reticulated, glabrous under- 

 neath P. sandwicensis 



Leaves orbicular, petiolate, mucronate P. orbicularis 



Leaves opposite, branches glabrous. 



Leaves coriaceous, velvety villous underneath on hirsute 



petioles P. Kauaiensis 



Leaves orbicular, sessile, glabrous P. rotundifolia 



Leaves obovate, retuse base, glabrous, chartaoeous 



P. Molokaiensis 

 Leaves elliptico-oblong, contracted, not emarginate 



P. macropus 

 Leaves ovate to obovate oblong, shining on both sides, cap- 

 sule very large, strongly anise-scented P. pseudoanisata 



Leaves ovate, thick coriaceous, capsule silky tomentose, 

 sepals and petals persistent P. Balloui 



III. Cubicarpae. 



Capsules cuboid, almost entire. 



Leaves opposite, capsules small. 



Leaves thin, glabrous, anise-scented P. anista 



Leaves elliptico oblong, coriaceous, glabrous. P. Wawraeana 



Leaves opposite, capsule large. 



Leaves obovate-oblong, chartaceous P. Zahlbruckneri 



213 



