505] MELIOLA IN PORTO RICO — STEVENS 37 



43. Meliola clavulata, Wint. 



Hedw. 25 : 98, 1886. 

 On Ipomoea sps. 



Sabana Liana, Aug. 13, '15, 9368. Monacillo, Aug. 12, '15, 9342. 

 Eio Piedras, Nov. 3, '13, 5^,W. Trujillo Alto, Aug. 15, '15, 9419. El 

 Miradero, Aug. 4, '15, 9169. Vega Alta, Nov. 1, '13, 4088. 

 On Ipomoea cathartica Poir. Fig. 32. 



Rio Arecibo, K. 64.7, July 8, '15, 7837. 



The folowing collections appear to belong to the same species but in 

 every instance the terminal setal cell was broken off. 

 On Ipomoea cathartica Poir. 



El Alto de la Bandera, July 15, '15, 8655, July 16, '15, 8692. Rio 

 Arecibo, K. 64.5, July 8, '15, 7782. Vega Baja, July 2, '15, 7729. 



On Ipomoea batatas (L.) Lam. 



Vega Alta, Nov. 1, '13, 5725. Rio Tanama, July 7, '15, 7927, 

 7926. Maricao, July 20, '15, 8954. 



On Ipomoea tiliacea (W.) Choisy. 

 Mayaguez, No. 46. 



On Ipomoea sps. 



Trujillo Alto, Aug. 15, '15, 9432. Rio Piedras, Aug. 11, '15, 9466, 

 Aug. 10, '15, 9196. Mayaguez, Aug. 12, '15, 8098. San German, Dec. 

 12, '13, 5850. 



The species was originally described from St. Thomas, Africa, but 

 the Porto Rican specimens agree remarkably with Winter's description, 

 and with a "cotype" specimen (E. Ule, Rio de Janeiro, Brazil 7, 1887), 

 kindly sent to me by H. Sydow. 



44. Meliola nigra sp. nov. 



Colonies very black, velvety with setae, amphigenous, more abun- 

 dant above, circular, 1-10 mm. in diam. Mycelium forming a close net- 

 work of threads, branches mostly opposite and at nearly right angles, 

 7/i in diameter. 



Capitate hyphopodia alternate, not crowded, about llfi apart, 

 head cell obovoid or pyriform or angular, 14 x 10/x, basal cell short. 

 Mucronate hyphopodia opposite, bottle-shaped, 17/x long. Perithe- 

 cial setae none. Mycelial setae many, forming a dense covering to the 

 whole of the colony except its extreme edge. About 200-270/i long, 7-9/i 

 thick, dark throughout, curved, often recurved at tip. Tip obtuse. 



Perithecia 150-160/1, slightly rough with rounded protuberances. 

 Asci 2-spored ; ascospores 4-septate, brown, very slightly constricted, 

 obtuse, 37-41 x 14-17/x. 



