Rock: NEw HAWAIIAN PLANTS 137 
3 mm. long, with a median nerve; corolla deep purplish red, 7-8.5 
cm. long, I cm. wide, the lobes 1.5 cm., the dorsal slit extending 
one fifth the length of the tube; staminal column glabrous adherent 
up to about the middle of the corolla, the anthers glabrous, the 
lower only bearded; fruits globose, crowned by the tubular limb 
of the calyx, which disappears at the maturity of the fruit. 
Oanu: Mt. Konahuanui trail, Palolo Valley, Mt. Olympus, 
and Manoa Valley, Kalihi Valley, January, 1870, W. F. Hillebrand, 
without number, in Berlin Herbarium; June 14, 1908, H. L. Lyon 
8816 in the herbarium of the College of Hawaii; September, 1912 
and 1914, J. F. Rock 10250a, 10250b, in the herbarium of the 
College of Hawaii. 
The plant in question is certainly worthy of specific rank. 
Young plants which the writer observed were of the same habit as 
mature ones, both having linear-lanceolate leaves, while the true 
Rollandia longiflora Wawra has sinuate leaves when young and 
also when in a mature state. R. angustifolia differs mainly in the 
linear, entire, minutely denticulate leaves, which give the plant 
an entirely different appearance from that of R. longiflora. 
4. Lobelia oahuensis sp. nov. 
Plant rather stout, stem short and thick, solid and not hollow; 
rosette of leaves very dense and about 1 m., in diameter; leaves 
densely packed around the apex of the stem, linear-oblong, acumi- 
nate at both ends, merging at the base into a winged fleshy petiole 
about 2.5 cm. in length, 50 cm. long, 4.5-5 cm. wide, thick, coria- 
ceous, dark green, glabrous above and covered with a strongly 
impressed, very close, reticular net work, young leaves densely 
hirsute underneath, especially along the very prominent pro- 
jecting midrib and veins, of a dirty grey or fawn color on the older 
leaves, the margins revolute, denticulate with thick callous teeth; 
flowers not seen, a single dead terminal flower stalk was seen on one 
of the plants, which was about 1 m. long. 
Oauu: at the very top of the main crest of the island, over- 
looking the cliffs of Waimanalo at an elevation approaching 3,000 
feet, September 14, 1917, J. F. Rock 12836, Type, in the herbarium 
pS th 
of the Collegeof Hawaii. Several pl g g tog ; 
the lower ones of which could not be reached owing to the vertical 
cliffs on which they grew, immediately below the knife-edge crest 
of the backbone of the island of Oahu. The plant forms a large 
