136 Rock: NEw HAWAIIAN PLANTS 
12831 (flowering specimens), Type, in the herbarium of the Col- 
lege of Hawaii. 
This rather variable species is remarkably like a Rollandia. 
The plant varies considerably in the spinosity of the leaves, 
petioles and stems; some of the specimens almost approach Cyanea 
noli-me-tangere Rock in spinosity, while others are only muricate. 
The color of flowers is also variable, ranging from pale yellowish 
white with deep purplish streaks to entire dark purple. It is diffi- 
cult to state to what known species the plant is closest related; in 
habit it approaches Rollandia lanceolata Gaud., but actually seems 
to come close to Cyanea noli-me-tangere; from the latter it differs in 
the long-petioled leaves, which are much larger, and in the longer 
naked peduncles which are not spinose. The plant as a whole is 
much larger in every way, the flowers are purple as are the veins 
and midrib of the leaves; the whole inflorescence is glabrous. C. 
noli-me-tangere is very loosely foliate, while C. rollandioides is 
simple-stemmed and has at its apex a dense crown of leaves, this 
feature bringing it under the section Palmaeformes. 
The plants grow in the wet forests of Puna on Hawaii, a little- 
explored district and one of the most primitive regions on the 
island of Hawaii. A stalwart Hawaiian gave the writer the native 
name Aku-aku for the species in question, of which he said that 
the leaves were cooked with meat and eaten like cabbage. The 
name Aku alone is applied to Cyanea tritomantha Gray, to which our 
plant has no resemblance.’ The species was collected in company 
with Brother Matthias Newell, of Hilo, an ardent naturalist. 
3. Rollandia angustifolia (Hillbrd.) sp. nov. 
Rollandia longiflora 8 var. angustifolia Hillbrd. Fl. Hawaiian Isl. 
246. 1888. 
Stem smooth, 1-1.5 m. high, leaves linear-lanceolate, 18-35 
cm. long, 2.5-3.75 cm. wide, thick, fleshy, dark green, glossy above, 
pale whitish underneath, with dark purplish midrib and veins, 
acuminate, mucronate at the apex, gradually narrowing at the 
base into a fleshy petiole 2-4.5 cm. long, glabrous on both sides; 
racemes slender, 3-4 cm. long, four- to five-flowered ; pedicels thin, 
about 14 mm. long, bracteate at the base, bi-bracteolate about the 
middle; calyx turbinate, 1 cm. long, the apex truncate-dentate, or 
oftener lobed, the calycine lobes acute, of irregular length, usually 
