242 BOTANICAL GAZETTE [MARCH 
Helminthosporium melastomacearum, sp. nov. (fig. 11).— 
Mycelium very fine, 1-1.5 yw, reticulated. Conidiophores abun- 
dant, black, lax, long, thin, 2803 4. Conidia narrowly elliptical, 
3-septate, acute at each end, 14-21 X3.5-6 uy. 
On Meliola melastomacearum Speg. on Miconia racemosa, 7389, Mayaguez 
(type). On Meliola glabra var. psychotriae Stev. on Psychotria grandis, 7487, 
Mayaguez. On Meliola paulliniae Stev. on Casearia arborea, 5709, Monte de 
Oro; on Casearia sylvestris, 1051, Mayaguez, 7285, Arecibo-Lares Road. 
Helminthosporium panici, sp. nov.—Mycelium fine, pale, in 
loose network. Conidiophores 1704, dark, pale at tip. 
Conidia 3-septate, terminal cells usually pale, central cells darker, 
basal cell truncate, apical cell constituting a short beak. 
On Meliola panici E. on Olyra latifolia, 9159 (type), 7300, Mayaguez. On 
Meliola rectangularis Stev. on Coccolobis laurifolia, 7292, Arecibo-Lares Road. 
Helminthosporium parathesicolum, sp. nov. (fig. 12).—Myce- 
lium copious, fine, 1.5 4. Conidiophores solitary, pale, 1204 HK. 
Conidia 1-3-septate, 17-20X4-6 uw, base truncate, apex beaked, 
beak often 7 u long. 
On Meliola parathesicola Stev. on Parathesis serrulata, 8192, Las Marias 
(type), 7286, Arecibo-Lares Road. On Meliola bicornis Wint. on Dalbergia 
monetaria, Arecibo-Lares Road, 7243. On Meliola rectangularis Stev. on Banis- 
teria oe 4392, 4384, Utuado, 7358, Hormigueros, 7564, Mayaguez 
Thi ies is similar to H. panici, but is distinguished from it by the 
beaked ae It appears to be identical with the structures described as 
conidia of M. bicornis by GarLtard, although the conidia here are somewhat 
smaller. 
Helminthosporium philodendri, sp. nov. (fig. 13).—Mycelium 
fine, pale. Conidiophores abundant, long, slender, 400 X 3-4 #, 
torulose at tip. Conidia 3-septate when mature, clavate, dis- 
tinctly beaked, 24~35 «5-8 u. 
On Meliola philodendri Stev. on Philodendrum krebsii, 4346, Ponce. 
Helminthosporium helleri, sp. nov. (figs. 14, 15).—Mycelium 
fine. Conidiophores solitary, black, 2307 yu. Conidia 3-septate 
when mature, clavate, 24-35 5-9 u, well differentiated basal and 
apical cells. 
On Meliola helleri E. on Myrcia deflexa, 8268 (type), 8296, El Alto de la 
Bandera; on Eugenia stahlii, 5343, Luquillo Forest, 8436, Jajome Alto. On 
