ROSACEOUS RENERA. 345 



PsTCHROBATiA. Slender and subalpine herbs, prostrate, 

 rooting at the nodes. Leaves pedately compound, with foliaceous 

 stipules. Flowers white, solitary on long filiform peduncles- 

 Calyx of 5 nearly distinct sepals often toothed near the summit, 

 as also the petals. Pistils Tery few, only two carpels maturing, 

 becoming a pair of large glabrous red drupelets too weighty for 

 their delicate peduncle and lying on the ground. Pyrenes 

 sparingly wrinkled, not reticulate. 



P. PEDATA. Smith, under Rubus. 



CoMAROBATiA. A prostrate unarmed undershrub, sometimes 

 rooting at the nodes. Leaves simple, 3-lobed, or now and then 

 quite divided into 3 leaflets. Peduncles erect in both flower and 

 fruit, 1-3-flowered. Sepals ovate, entire, acuminate or cuspi- 

 date, unequal. Petals broad and obtuse, white. Pistils very 

 few ; ovaries silky-tomentulose, several maturing to large 

 villous drupelets. Pyrenes lightly wrinkled. 



C. LASiococcA. Gray, under Rubus. 



Chamaemorus, Clusius, Hist. 118 (1601.) Unarmed, 

 mainly herbaceous low upright perennials. Leaves simple- 

 stipules large, oval. Flower solitary, terminal : calyx 5 -parted 

 almost to the base ; sepals erect, partly covering the fruit ; this 

 of few large very juicy drupelets adhering to their receptacle. 

 Pyrenes large, smooth. 



C. Akglica, Clusius, 1. c. 



C. NoRWEGiCA, Clusius, 1. c, 119. 



Leaflets of Botanical Observation and Criticism, Vol. I, pp. 

 245-247. 17 Oct., 1906. 



