202 
JOSEPH F. ROCK 
Plantago princeps var. hirtella A. Gray, Proc. Amer. Acad. 6: 54. 
1866. 
Stem erect, 60 cm. high, hollow, with permanent wool in the axils or 
straight, silky hair of a rich brown color; leaves oblong-elliptical, flaccid, 
10 to J4 cm. long, 2.5 to 3.5 cm. broad, acute or acuminate at the apex and 
the base, on slender hirsute petioles of 3 to 5 cm., the latter semi-amplexi- 
caul at the base, hirsute on both surfaces but denser below, 7- to 9-nerved; 
spikes hirsute, glabrous when old, flexuous, 30 to 45 cm. lopg; bracts and 
sepals ciliate, the bracts little more than half the length of the calyx, with a 
few hairs in the axils. 
Kauai: "Tabular Summit," U. S. Explor. Exped. in Gray Herb.; 
Waimea (2,000-3,000 feet) Mann & Brigham 613, in Gray Herb.; Waimea 
(2,000-3,000 feet) Hillebrand, Berlin Herb. 
Oahu: Makaleha Valley, Hillebrand, Berlin Herb., specimen not seen. 
Variety hirtella, while distinct from other varieties, differs only slightly 
from var. denticulata from Molokai and that mainly in the permanent wool 
on the stem. There is quite a noticeable denticulation present on the leaf 
of the type specimen as well as on the specimens collected by Mann. The 
petioles in the present variety are very slender, while in those of Molokai 
they are broad and stem-clasping. 
The distinguishing characters given by Hillebrand as ''stem hollow in 
hirtella and solid in denticulata'' do not hold good, since denticulata has also 
hollow stems or the central cavity is filled with a more or less spongy pith 
near the base of the stem which makes it appear to be solid. 
Plantago princeps var. denticulata Hillebr. Fl. Haw. Isl. 364. 
1888. 
Stems 60 to 90 cm. long, with permanent scaly wool in the axils; leaves 
oblong-obovate, 15 to 25 cm. long, 3 to 5 cm. broad, not distinctly petiolate 
or the petioles broadly winged, broadly dilating at the base and semi- 
amplexicaul, hispid on both faces or papillose, 9- to ii-nerved, margins 
glandular-denticulate; numerous spikes, often 45 to 60 cm. long, hispid 
when young or glabrous when old, loosely flowered; bracts ciliate, but with 
very short indistinct hair in the axils; capsules as long as the calyx. 
Molokai: Pali of Pelekunu, Hillebrand in Berlin Herb.; Pali of Wai- 
kolu, Hillebrand in Berlin Herb., College of Hawaii Herb. no. 16003, and 
Gray Herb.; Kamoku stream near camp, March 19, 1910, Rock, College of 
Hawaii Herb. no. 6120. 
The stems of this variety are not simple, but branch in a candelabra-like 
manner; they are not solid as stated by Hillebrand, but hollow as is shown 
by his own specimens in the Berlin and Gray herbaria. Waikolu plants 
have more or less glabrous leaves, while those from Pelekunu are hirsute or 
hispid as are the writer's specimens from Kamoku stream, 1,500 feet lower 
than Pelekunu. 
As has already been stated under variety hirtella, the present variety 
comes close to that variety, but differs in the glabrous stem and broadly 
