Compositae. 
very difficult to distinguish them. Some species will have to be united, and per- 
haps one or two new species described, as they do not fit in Hillebrand’s key to 
the species. 
KEY TO THE SPECIES. 
Leaves with a viscous pubescence; inflorescence paniculate........... R. arborea 
Leaves silky pubescent, lanceolate acute. ....0s.2cs0csce eee eoeec wens R. struthioloides 
Leaves glossy, stiff ciliate; flower heads in a foliose raceme........... R, Menziesii 
Raillardia arborea Gray. 
Naenae. 
(Plate 212.) 
§ Rewpereey ARBOREA Gray - — Am, Acad. V. C1E63) 134;—H. Mann Proc. 
VIT. (1867) 176 . Fl. Haw. Isl. (1888) 228 ;—Hoftm. in Eng. et Prantl 
5. (1889) 248; Teo Seat. Th. Fl. Ins. Mar. Pac, VI (189 0) 213. 
Young branches and inflorescence hirsute Ape glandular hairs; leaves ternate, close, 
sessile with a broad base, but not clasping, 3 to 5 nerved, hispid and viscid as is the 
inflorescence; the foliose panicle 8 to 10 em oy involucre of 9 to 14 bracts with 22 to 45 
florets; corollae glandular; achenes glabrous. 
This species, which inhabits the dry upland slopes of Mauna Kea, is by no 
means common. It is usually a shrub or, when growing in black cinder at an 
elevation of 10,000 to 11,000 feet, a tree of about 20 feet in height with a trunk 
a foot in diameter. The writer saw only a few trees; the best developed speci- 
men grew at a little over 10,000 feet on the slopes of Mauna Kea above Kemole; 
above Waikii at 9000 feet elevation it was a shrub, as well as back of Nau crater 
on the windward slope at 8000 feet. These arborescent Raillardia have a peculiar 
odor, and their presence can be detected long before the plants are reached, 
when once familiar with the odor. This applies also more or less to the shrubby 
species of the lower forests. Raillardia arborea is associated with Styphelia 
Grayana, Geranium cuneatum var. y., Raillardia struthioloides, Sophora chry- 
sophylla, Rubus Hawaiiensis, Coprosma montana, Rumex giganteus, ete. It can 
stand severe frost, and is sometimes covered with snow during part of the year. 
Raillardia struthioloides Gray. 
Naenae. 
RAILLARDIA re Gray in Proce. Am, Acad. V. (1862) 134;—H. Mann 
Proce. Am. Aead. I. (1867) 176;—Hbd. Fl. Haw. Isl. (1888) 228; :—Del Cast. Il. 
Fl. Ins. Mar. Pacif. WL (1890) 214, 
small tree 6 to 7 * high, with a trunk of about 22 em in diameter, the vi Pr 
pretinnr eh with a silky not glandu lar Baca tie ce; leaves closely crowded, erect, imbri 
or ength spreading, rh olate, 5 long, 8 to 14 mm wide, acute, broadly soanle. 
per coriaceous, rather concave Ete young, with 3 to 5 indistinct nerves, dull opaque, 
eanescent with soft appressed hairs, scabrous on the margin, but not ciliate; aia pon 
a raceme or panicle 10 to 15 em long, with recurved pedicels; heads 12 mm; involuere 8 mm 
pubescent, of 7 to 11 bracts; florets 12 to 22, the corolla almost tubular, not semeked. 
This species, which is usually a shrub, but often a tree of 20 feet or so in 
height, ascends the highest of any of our Raillardia, as it can be found at an 
elevation of 11,500 feet on Mauna Kea. The trunk is not thicker than about 
nine inches. It differs from R. arborea in not being viscous, but covered with 
503 
