814 MINNESOTA BOTANICAL STUDIES. 



PIPTURUS Wedd. Ann. Sc. Nat. (IV) 1:196. 1854. 



Pipturus albidus (H. & A.) A. Gray, in Mann, Proc. Am. Acad. 

 7:201. 1867. 



Boehmeria albida H. & A. Bot. Beecby 96. 1832. 

 Pipturus laitensis Wedd. Add. Sc. Nat. (IV) 1: 197. 1854. 



On the mountains back of Honolulu, at elevations of about 

 2000 feet, this species is rather common, growing on moist and 

 thinly wooded slopes. It is identical with Marin & Brigham's 

 No. 45, upon which Asa Gray founded Pipturus albidus. As 

 additional evidence, the Hawaiian plants of the Beechey voy- 

 age, were collected on the islands of Oahu and Niihau, and this 

 is a species which is not likely to occur on the latter island, as 

 there is not sufficient rainfall, or great enough elevation. It 

 is a large bush or small tree, with a distinct trunk and loosely 

 spreading branches. The leaves are broadly ovate, thick, 

 crenate from the shortly pointed apex to near the base. The 

 upper surface is irregularly papillose and rough looking, yet 

 to the touch is almost smooth. The under side is covered be- 

 tween the veins with short, dense, white tomentum. The dark 

 veins and veinlets are hirsute. In DeCondolle's Prodromus, 

 Weddell has evidently confused at least two distinct species, 

 and Hillebrand has followed him. The variety meyeniana of 

 Weddell is probably nothing more than typical albidus, as no 

 other forms were seen on Oahu. 



April 11 (2120); probably from the original locality. 



Pipturus gaudichaudianus Wedd. Ann. Sc. Nat. (IV) 1: 196. 

 1854. 



On Kaholuamano above Waimea, Kauai, at an elevation of 

 3500 to 4000 feet, is found a plant which answers fairly well to 

 the description of the above species. It is a bush, four to six 

 feet high, with slender, ascending branches. The broadly 

 eliptic-ovate leaf is usually four inches or more in length, 

 crenate, shortly pointed, the upper side smooth in appearance, 

 but rough to the touch, and under a lense appressed pilose and 

 closely granular The tomentum beneath is very close and not 

 nearly so white as in P. albidus. Wawra has recorded it from 

 "Maui: Waiheeberge, 1814/' 



September 2 (2786). 



