Rutaceae. 
here was collected along the Honomanu trail on the northern slopes of Mt. Ha- 
leakala, Maui, elevation 2500 feet, with enormous leaves 20 em wide; another 
form at 4000 feet elevation on the same island in the forests near Olinda, with 
smaller leaves, flowering, September, 1910; no. 8534 
Hillebrand’s var. y. macrophylla with large glabrous leaves is from Kauai. 
On the Island of Hawaii, in the Kohala Mts. proper, west of Honokanenui gorge, 
the writer collected specimens of a tree 15 to 20 feet high, with very robust 
branches; the leaves are glabrous, thick coriaceous, and probably belong to Hille- 
brand’s var. y. The leaves are on petioles of 5 to 5.5 em and differ therefore from 
the latter variety, which has the leaves on short petioles of 6 to 8 mm; it may 
be known as forma coriaceum f. nov. 
Collected June, 1910, fruiting, no. 8367, in College of Hawaii Herbarium. 
Var. sessilifolia Rock var. nov. 
As rubby agit Dla erect stems sto at the apex; leaves large, opposite, per- 
fectly ats dag oad base, oblong or obovate bigs cagocesi tapering betieabs the 
base, very thin tink ceous, tran spa nee midrib an eins prominent, rounded 2 Rati 
apex, glabrous shore pubescent underneath, 26 to 38 em long, 9 to wide, 
as in species, the eed acute; capenio exceedingly large, the erect cocci io Be by 
a very broad sinu 
Collected in oe dense forests of the summit mountain of the Kohala range, 
Hawaii, fruiting July 12, 1909, type no. 4222 in the College of Hawaii Her- 
barium. 
EUPHIORBIACEAE. 
This is an exceedingly large family, consisting of more than 208 genera with 
many species, distributed over all parts of the world, with the exception of the 
Arctic and Alpine regions. 
The genus Euphorbia is the most widely distributed of the family, reaching 
as far as the polar borders of the northern and southern hemispheres. 
In the Hawaiian Islands the family is represented by five genera, four of 
which have arborescent species. 
KEY TO THE GENERA, 
Plants not milky: 
SP 
E. monoecious or dioecious; beh cells two-ovulate: 
Leaves alternate acre pb berry, ns st seeds arillate.... eowawraea 
Leaves alternate, entire; frui s flat, on Cd... sees errr eee ees ntidesma 
I. CROTONEAE. Flow jemeens us or din ecious; ovary cells one-ovulate: 
Leaves alternate, areuate or serrate; fruits capsular, two-three gine ; 
DS ee Pe eae CR CoCr gee re ner rn SRN RE Uitte ae, aoxylon 
Leaves alternate, lobed; stone fruit one-seeded, splitting into two- fou cocci 
ee Ss eee ie ne a Ree hee SOR ee meee we eee Aleurites 
Plants milky: Sag 
III. EUPHORBIEAE. Flowers mostly monoecious, rarely dioecious; ovary three 
celled, one-ovulate: horbi. 
ioncue opposite, linear; fruit a three celled capsule....-----.---- Euphorbia 
NEOWAWRAEA Rock gen. nov. 
Flowers ig ee Male flowers: sepals 5, of unequal shape and size. Petals none. 
Stamens 3° to 4, rarely 5, inserted between the sinuses of the hypogynous disc, consisting 
243 
