i894-] Undescrihed Plants from Guatemala* ii 



phous and very unequal in the pair; the larger lanceolate to 

 rhomboid-elliptical (18-36x6-10'), tapering each way from 

 middle, apex obtuse, base acutely narrovved into short (2-3') 

 petiole; the smaller obovate or rhomboid-orbicular, apex 

 rounded, base acute, petiolate: dioecious; pistillate cymes (the 

 only seen) not exceeding petiole of larger leaves, pedunculate, 

 divaricate, flowers pedicellate, interior segment of perianth 

 subequalling the others and mlnutely cucullate, twice ex- 

 ceeded bystaminodes, half as longasobliquely oval (0.75') and 

 pubescent achenium. — Nearest to P. dendrophila Miq. — On 

 decayed mossy trunks of trees, Pansamala forest, Depart. 

 AltaVerapaz, alt. 3,800", June 1886, von Turckheim, no. 939. 



Pilea riparia. — Stem repent, elongate, ligneous, slmple 

 branches ascending (6-12'°): stipules minute, deltoid; leaves 

 glabrous, thick, subentire, 3-nerved from base to middle on 

 upper surface and nearly to apex on reticulated lower surface; 

 the larger in the pair oblong-elliptical (3.5-4x1.75'°), long- 

 acuminate, tapering gradually to short (2-4') petiole; the 

 other a fourth smaller, obovate-elliptical, abruptly acuminate; 

 cystoliths of upper surface densely stellulate-punctiform, of 

 lower minutely linear, of margins large and fusiform: dioe- 

 cious; staminate cymes not seen; the pistillate pedunculate, 

 little exceeding petiole, divaricate, interior segment of peri- 

 anth lightly gibbous on back and scarcely exceeding the oth- 

 ers, staminodes as long, oval achenium thrice longer (o. 5') 

 and smooth.— Nearest to P. marginata Wedd.— Specimens 

 of this, as well as also of the other proposed new species ex- 

 cept P. irrorata, have been compared by Dr. Taubert in the 

 Berlin Herbarium. I am likewise indebted to him for the 

 identification of several other Pilece, difificult of determination 

 without the aid of authenticated material.— On rocks in a 

 stream. Pansamald, alt. 3,800", August 1886, von Tiirck- 

 heim, no. 1,040. 



Pilea irrorata. — Herbaceous; stem shortly rooting at 

 base, stout, simple or forked (1-2"): stipules elongate-trian- 

 gular (2-3'), persistent; petioles long (1.5-3. S'°). canaliculate, 

 dilated at base and apcx; leaves membranaceous, smooth, 

 ample (6--9X2-4'"),elIiptical, caudate-acuminate, obtuse, base 

 acuminate, the opposite uniform and nearly equal, sinuate- 

 serrulate above middle, 3-nerved from insertion to apex, 

 transverse veins distinct and subparallel, above punctulate 

 andtoward base lineolate, cystoliths scarcely present beneath: 



