16 
or curved, 55-8O u x 90-25 u; paraphyses numerous, linear, flexuose, or somewhat 
crumpled. Spores distichous or conglobate, 1-septate, slightly constricted, upper loculus 
broader, 16-20 n x 8-10 u. ) 
15. Polystomella caulicola n. sp. 
On stems of Asparagus sp., banks of Orange River, Aliwal North, 11.1.12, Pienaar 
[2093]. a 
Stromata caulicolous, usually irregularly elliptic to linear in outline, elongated in a 
direction parallel with the stem axis, up to 8 mm. long, varying in width, 80-100 u high; 
often confluent and quite irregular in outline, attached at many points; surface rough, 
dull black. Covering membrane black, carbonaceous, formed of radiating hyphae about 
3-5 vu thick and consisting of numerous Microthyrium-like discs fused together at the = 
edges ; the membrane covers a number of flattened loculi which are 100-150 » diam. and 
80-90 v. high, and are separated by thin walled plectenchyma which are colourless or light 
brown. Hypothecium delicate, thin, colourless. Asci paraphysate, cylindrical-clavate, 
eight-spored, briefly pedicellate, 50-70 vu ` 18-20 u. Spores distichous, ellipsoid, hyaline, 
two-celled, very slightly constricted, cells sub-equal, 17-20 » x 6-8-5 u (not quite mature). 
Hypostroma well developed in the epidermis and penetrating into the sub-epidermal 
cells. 
Polystomella caulicola Doidge, n. sp. 
Stromata caulicola, elongata, usgue 8 mm. longa, 80-100 u alta, pluries affixa, mem- 
brana una radiato e cellulis 3-5 y er. contexta, carbonacea, ex pluribus quasi-Microthyriis 
conflata tecta, ex hypothecio epidermali oriunda. Loculi rotundati, 100-150 u diam., 
80-90 vy. alti, hypothecio tenue, hyaline. Asci paraphysati, cylindracei v. clavati, octo-- 
spori, breviter pedicellati, 50-70 u x 18-20 yu. Sporae distichae, ellipsoidae, hyalodidymae, 
leniter constrictae, loculus subaequalibus, 17-20 y « 6-8-5 u (vix maturis). 
Hab. in caulibus Asparagi sp., Aliwal North, 11.1.12, leg. Pienaar [2093]. 
16. Palawaniella Doidge, nov. gen. Polystomellacearum. 
Stromata superficialia, orbicularia, pluries affixa, hypostromate in epidermide bene 
evoluto, radiato-contexta, carbonacea; mycelio libero nullo; loculis e medio evoluto, 
plus minusve annulatim dispositis, sed discretis, rotundatis ; hypothecium tenue; asci 
paraphysati, octospori; sporae phaeodidymae. 
This genus differs from Palawania chiefly in the centrifugal development of the 
stromata, and in the epidermal, rather than sub-epidermal hypostroma. It differs from 
Plevostomella in the brown, two-celled Spores ,; the loculi are less definitely arranged in 
concentric rings. 
Palawaniella eucleae n. sp. 
On living leaves of Fuclea macrophylla, Howiesons Poort, near Grahamstown, 12.7.19, 
Doidge [12375]. 
Stromata epiphyllous, scattered, round, 4-7 mm. diam., loculi developing centrifugally 
and arranged in more or less definite concentric circles ; these show first of all as minute 
black points, which increase in size up to 160-500». diam. ; in the centre the loculi are 
very closely crowded ; towards the circumference they are more scattered, but in either 
case they are round to oblong, discrete, 80-90 y high, adnate with their whole base to the 
substratum. The outer wall is radial in structure and splits at maturity by irregular | 
stellate or, less frequently, longitudinal fissures. a 
Hypostroma well developed, formed of fuliginous hyphae which form compact balls : 
in the epidermal cells; hyphae may often be traced running between the palisade cells 
and the epidermal cells, and so connecting adjacent loculi. There are no stomata on the 
upper surface of the leaf and the cuticle is not ruptured, the ascus-bearing stroma being > 
connected with the hypostroma in the epidermal cells by numerous fine, colourless fila- 
ments, which penetrate the cuticle; these are about 1-1-5 y thick. Hypothecium thin, 
colourless. 
