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 R. struthioloides 



Leaves glossy, stiff ciliate; flower heads in a foliose raceme , R. Menziesii 



Raillardia arborea Gray. 

 Naenae. 



(Plate 212.) 



RAILLARDIA ARBOREA Gray in Proc. Am. Acad. V. (1862) 134; H. Mann Proe. Am. 

 Acad. VII. (1867) 176; Hbd. Fl. Haw. Isl. (1888) 228; Hoffm. in Eng. et Prantl 

 IV. 5. (1889) 248;-Del Cast. 111. Fl. Ins. Mar. Pac. VI (1890) 213. 



Young branches and inflorescence hirsute with 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 cm long, 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 b3 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 cliry- 

 sopliylla, Rubus Hawaiiensis, Coprosma montana, Rumex giganteus, etc. It can 

 stand severe frost, and is sometimes covered with snow during part of the year. 



Raillardia struthioloides Gray. 

 Naenae. 



RAILLARDIA STRUTHIOLOIDES Gray in Proc. Am. Acad. V. (1862) 134; H. Mann 

 Proc. Am. Acad. VII. (1867) 176; Hbd. Fl. Haw. Isl. (1888) 228; Del Cast. 111. 

 Fl. Ins. Mar. Pacif. VI. (1890) 214. 



A small tree 6 to 7 m high, with a trunk of about 22 cm in diameter, the branches 

 canescent with a silky not glandular pubescence; leaves closely crowded, erect, imbricate, 

 or at length spreading, lanceolate, 5 cm long. 8 to 14 mm wide, acute, broadly sessile, 

 entire, coriaceous, rather concave when young, with 3 to 5 indistinct nerves, dull opaque, 

 canescent with soft appressed hairs, scabrous on the margin, but not ciliate; inflorescence 

 a raceme or panicle 10 to 15 cm long, with recurved pedicels; heads 12 mm; involucre 8 mm, 

 pubescent, of 7 to 11 bracts; florets 12 to 22, the corolla almost tubular, not exserted. 



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 



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