Rutaceae. 



The trees from Hawaii first mentioned differed somewhat from Hillebrand's 

 description, and on this, as well as on the strength of its exceedingly aromatic 

 odor, it is here described as a new variety. 



Var. citriodora Rock var. nov. 



Leaves 3-foliolate on a common pubescent petiole of 4 cm. leaflets deltoid 3.5 to 4 cm 

 in diameter on not articulated petiolules, the median one 5 cm, the lateral one 3 cm, 

 puberulous underneath, transparent, with a continuous row of pellucid oil glands along 

 the entire margin, strongly lemon-scented when fresh, young leaves velvety tomentose. 

 panicles pubescent at the end of the branchlets. sepals and petals pubescent, the latter 2.5 

 mm ovoid, stamens as long, anthers ovoid, the rudimentary ovary pubescent. 



Hillebrand's variety /?. the writer collected on Lanai. This variety has cori- 

 aceous leaves which are also larger, ovoid to orbicular and even deltoid; it is as 

 a whole a much more robust tree and entirely glabrous. Collected without flower 

 or fruit July 24, 1910, in Kaiholena Valley, Lanai, no. 8076 in College of Ha- 

 waii Herbarium. On Kauai the writer saw one tree and collected specimens of 

 the same below Kaholuamano, growing on the edge of one of the canyons. It 

 must be referred to Hillebrand's var. /?., from which it, however, differs in the 

 lateral petiolules, which are only 1.5 cm long. Collected Sept. 18, 1909, Kaho- 

 luamano, Kauai. (No. 5207 in College of Hawaii Herbarium.) 



Var. velutinosum Rock var. nov. 



Leaves 3-foliolate on a common petiole of 4 to 5 cm, leaflets on petiolules of nearly 

 even length, ovate acuminate, not articulate, truncate to unevensided at the base, gray- 

 velvety tomentose throughout on upper and lower surface, quite opaque, without marginal 

 oil glands, and not lemon-scented, in fact without any odor, even when leaves are crushed; 

 stipules below the leaf-whorls, spathulate, many nerved, pubescent. 



This tree occurs on the lava fields of Puuwaawaa, North Kona, Hawaii, ad- 

 joining the lava fields of Puuanahulu, where the variety citriodora occurs. This 

 variety differs from the latter in the shape of the leaves, which are inodoriferous 

 and densely velvety tomentose and quite opaque and without marginal oil glands. 

 Collected March, 1912 ; type no. 10205 in College of Hawaii Herbarium. 



Xanthoxylum glandulosum Hbd. 

 A'e or Hea'e. 



XANTHOXYLUM GLANDULOSUM Hbd. Fl. Haw. Isl. (1888) 74; Del Cast. 111. Fl. 

 Ins. Mar. Pacif. VI. (1890) 129. Fagara glandulosa Engl. in Engl. et Prantl 

 Pflzfam. III. 4. (1895) 119. 



Leaves 9 to 7 foliolate, 18 to 20 cm long, the leaflets lanceolate 7.5 to 9 cm x 2.5 to 3 

 cm, acute, contracting at the base, membraneous, glabrous, copiously punctate with large 

 transparent oil-dots, the common petiole about 2.5 cm, that of the terminal leaflet about 18 

 mm, the lateral leaflets subsessile. 



Hillebrand collected this species on AVest Maui, gulch of Lahainaluna. The 

 writer found a small tree 10 feet high of this species in Waihou Gulch, near the 

 spring at the head of the valley, back of Makawao on the northwestern slope of 

 Mt. Haleakala on East Maui, elevation 3000 feet. The tree was neither in flower 

 nor fruit; the 7-foliolate leaves were coriaceous and not membraneous. A va- 



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