Hepaticae : Yale Peruvian Expedition of 1911. 299 



The close relationship between P. chlorocarpum and P. peruvianum 

 Nees & Mont, has already been commented upon by Montagne.^ 

 P. chlorocarpum may be distinguished, however, by its dioicous in- 

 florescence and by its lack of apical innovations, the branching being 

 either by forking or by means of lateral adventive shoots. In 

 P. peruvianum the inflorescence is monoicous and apical innovations 

 are frequently seen. The original material of P. peruvianum was 

 collected by d'Orbigny in Bolivia and not in Peru, and no additional 

 collections have been reported. 



II. March antia L. 

 2. Marchantia lamellosa Hampe & Gottsche 



Marchantia lameUosa Hampe & Gottsche; G. L. & N. Syn. Hep. 527. 

 1846. 



On a dry earth bank, Cuzco, 11,500 feet, July 6, 1911. 



The present specimens include two gemmiparous plants only and 

 are referred to M. lamellosa on account of the conspicuous scales, 

 which are deep purplish black in color and almost cover the ventral 

 surface. Unfortunatel}' the absence of sexual branches and of 

 sporophytes makes a positive determination impossible. M. lamellosa 

 was based on material collected by Moritz in Colombia. It has 

 recently been recorded from Ecuador by Stephani, but apparently 

 no other stations are at present known. 



METZGERIACEAE 



III. Metzgeria Raddi 

 3. Metzgeria scyphigera sp. nov. 



On apple wood, Urubamba, 9,500 feet, July 17, 1911. The same 

 species was collected by Barnes & Land at La Cima, Mexico, in lava 

 fields (but on wood), at an altitude of 9,800 feet, on October 14, 1908, 

 specimens received from W. G. Farlow. The Peruvian material 

 may be designated the type. 



Yellowish green, sometimes tinged with blue, growing in depressed mats : 

 thallus when normally developed prostrate, repeatedly dichotomous, well- 

 developed branches about i mm. wide, mostly 0.9—1.5 mm. long between 



1 Fl. Boliv. ; d'Orbigny, Voy. dans l'Am6r. Merid, 7^ : 60. 1839. 



