Euphorbiaceae. 
EUPHORBIA L. 
Cyathium campanulate, 4 to 5 lobed, the lobes entire or slit, often hidden by glands, 
Glands between the lobes, rarely less, entire or two horned or di itate. Male flowers: 
numerous without calyx, very rely with a small se he articulation of the stamens 
Femal 8: single from the mid of the cyathium, finally stipitate and exserted fr 
the cyathium, naked or with a calyx fort by three small scales ree 
united, entire or bifid. Japsule separating into 3 two-valved cocci —Herbs, shrubs or 
trees, abounding in eee juice. Leaves entire, opposite, or alternate. Cyathia in ter- 
minal cymes or in the axis of two di chotomous pene ches, or in the axils of the leav es; 
stem often thick dean. cactus- rita or even leafles 
The genus consists of more than 600 species, and is distributed especially 
over the warmer regions; it is absent in the Arctie regions, and only very 
sparingly represented in the colder parts of the temperate zone. 
In the Hawaiian Islands ten species are endemic, of which only three be- 
come small trees. 
All Hawaiian Euphorbiae are called Akoko or Atoto by the natives. The 
name Atoto appears also in Tahiti for Euphorbia atoto, which is ealled Totolu 
and Totoyava by the Fijians. Euphorbia atoto is credited to the Hawaiian 
Islands by Seeman, who mistook for it the closely allied Euphorbia cordata of 
our seashores. 
KEY TO THE SPECIES, 
Leaves linear oblong; flowerheads terminal or axillary, single; So small, 4. lorifolia 
Leaves obovate oblong; flowerheads in open axillary cymes; capsules large. E. Rockii 
Euphorbia lorifolia (Gray) Hbd. 
Koko or Akoko. 
(Plate 100.) 
SC OmELA. LORIFOLIA (Gray) Hbd. Flora Haw. Isl. cage itolt Gray ae Tl. FI. 
Saget Pacif. VII. (1892) 285.—E. multiformis var. lorifolia Gray in H. Mann, 
o Am. Acad. VII. (1867) 202.—E. multiformis var. cake stifolia Boiss. in DC. 
Prodr. XV. (1866) 11 (ex parte). 
A small tree, with stiff branches which are nodose with short anh ot — Benga 
lous; Leaves opposite, —— or net somewhat spathulate, 2.5 to 5 em lon mm 
Wi e, on petioles of 1 m alm seen tate se or piece) avg retose Pe rte von 
entire, slightly hekkrieted and anti incat uneven sided a e bas cad terminal or 
ome 
bracts; han 3 m € : 
within, with 4 suborbicular glands; the lobes obovate or pas with os ees 
bracteoles 3 to 4 fid; styles free to the base, shortly bifid with clavate branches; capsule 
hat, On & short stalk, 3 mm in diameter, puberulous, obtuse at the angles, the cocci 
broader at the as, seeds rugose, serobiculate. 
Var. gracilis Rock. var. nov. 
Branches not erect 00 stiff, but very slender and ee leaves ar gel oblong, 
acute at both ends, chart eous, opposite, on petioles of 2 to 3 mm, midri ge Moet 
Prominent, pubescent asmaaierhs pe os ee una the eocei of “equa ste 
Type no. 3593 j in College of Hawaii Herbar 
This variety is peculiar to Saree North Kona, Hawaii, where it ae 
on the aa lava fields. It reaches a height of 20 to 25 feet and a diameter 0 
259 
