870 MINNESOTA BOTANICAL STUDIES. 



Cheirodendron trigynum (Gaud.) 



Aralia trigyna Gaud. Bot. Voy. Uranie, 474, pi. 98. 1830. 



Panax? gaudichaudii H. & A. Bot. Beechy, 84. 1832. 



Hedera gaudichaudii A. Gray, Bot. U. S. Expl. Exped. 15: "19, pi. 



90. 1854. 

 Cheirodendron gaudichaudii Seem. Journ. Bot. 5: 236. 1867. 



A variable species, and perhaps the Panax? ovatum of Hooker 

 and Arnott may be distinct. A form, No. 2496, which much re- 

 sembles it, was collected on the ridge west of the Hanapepe 

 river, Kauai, at an elevation of about 3000 feet. The speci- 

 mens were taken from a tree about twenty five feet high. The 

 leaflets are broadly ovate, almost entire. On the plateau above 

 Waimea, specimens were collected which have elongated leaf- 

 lets, and more conspicuously serrate (2795). The first speci- 

 mens collected (No. 2313), were obtained back of Honolulu, on 

 the lower slopes of Konahuanui. In these, the leaflets are in- 

 termediate in shape between Nos. 2795 and 2496. In all cases 

 the leaflets are in threes. 



DIPANAX Seem. Journ. Bot. 6: 130. 1868. 



[Pterotropia Hillebr. Fl. Haw. Is. 149. 1888.] 

 In his treatment of this genus, Hillebrand discarded See- 

 man's name of Dipanax, and took up the section name Ptero- 

 tropia of Horace Mann, raising it to specific rank. If the three 

 species enumerated below truly belong to a single genus, as 

 held by both Mann and Hillebrand, they must bear the older 

 name of Dipanax. 



Dipanax dipyrena (Mann) 



Heptapleurum (Pterotropia) dipyrenum Mann, Proc. Am. Acad. 



7:168. 1867. 

 Dipanax mannii Seem. Journ. Bot. 6: 130. 1868. 

 Pterotropia dipyrena Hillebr. Fl. Haw. Is. 150. 1888. 

 This species was not collected by me. It is said to grow on 

 Lanai, Maui, and Hawaii. The type came from Lanai, and is 

 M. & B. 349. 



Dipanax gymnocarpa (Hillebr.) 



Pterotropia gymnocarpa Hillebr. Fl. Haw. Is. 151. 1888. 

 Not collected by me. Hillebrand's type was collected by 

 Lydgate, in the valley of Niu, island of Oahu. 



