808 MINNESOTA BOTANICAL STUDIES. 



PIPERACEAE. 



PEPEROMIA Ruiz. & Pay. PL Peruv. et Chil. Prodr. 

 8. 1794. 



Specimens of all the numbers of this interesting, but difficult 

 genus, were sent to M. Casimir DeCandolle for determination, 

 but, although more than a year has elapsed, no answer has been 

 returned. By the aid of Hillebrands Flora, and such other 

 works as are at hand, I have endeavored to trace the specimens 

 to their proper places, but not always with success. 



Peperomia hypoleuea montis-eeka Hillebr. Fl. Haw, Is. 422. 



1888. ? 



This plant, which was seen only near and on the summit of 

 Konahuanui, Oahu does not answer very well to Hillebrand's 

 description, yet it can hardly be placed under any of the other 

 species mentioned. Ordinarily, the under side of the leaf is 

 brick red, but in some specimens it is whitish. This was more 

 especially true of specimens collected late in the season. 



May to November (2243). 



Peperomia latifolia Miq. Syst. Pip. 128. 1843. 



A common plant at medium elevations on the mountains of 

 Oahu and Kauai. In the living state, the thick, fleshy leaves 

 are often of a red tinge beneath. 



April to October (2116). 



Peperomia leptostachya H. & A. Bot. Beechy, 96. 1832. ? 



The three numbers which m&y perhaps be referred to this 

 species, grow at low elevations. No. 2010 was collected in 

 Pauoa valley, back of Honolulu. It grew on rocks in exposed 

 situations, below the forest, and was noticed at several places. 

 The stems of these specimens are hirsute throughout. The 

 leaves on the young shoots are opposite, but are whorled on 

 the branches. The plants are erect, and usually not more than 

 eight inches high. 



No. 2237 was collected at about 1000 feet elevation in Waialae 

 valley, on the eastern end of Oahu. It grew on the ground 

 under the shade of Kukui trees. These plants were weak and 

 procumbent, many of the stems being fifteen or eighteen inches 

 long. The stems are puberulous instead of hirsute, as in No. 

 2010. The leaves are also longer. 



No. 2510 was collected on rocks along the Hanapepe river, 

 Kauai, at an elevation of perhaps 700 feet. This station is less 



