1922] 



PFEIFFER MONOGRAPH OF THE ISOETACEAE 211 



Specimens examined: 



Africa: Cape of Good Hope, Lehman (Gray Herb, and Mo. Bot. 

 Gard. Herb.). 



Gray Herb, collections shows megaspores 570-600 p in diam- 

 eter, minutely roughened on the three upper faces, and on the 

 fourth, showing short serpentine ridges. The vegetative charac- 

 ters coincide well with Baker's form ; the number of leaves is 11, 

 they are fine and long (31-32 cm.), and bear oblong sporangia 

 (3-5 mm. long), with no velum. 



It seems as if Rehmann might conceivably be a misprint of 

 Lehman. 



Mo. Bot. Gard. Herb, specimen has 10 very slender leaves, 

 30-55 cm. long, with fairly prominent basal sheath; spores of 

 same character as above but as low as 480 p ; velum very narrow. 



64. 1. neoguineensis Baker in Sadebeck, Engl. and Prantl, Nat. 

 Pflanzenfam. I 4 : 776. 1901. 



Placed with /. Mulleri A. Br. and /. Kirkii A. Br., under divi- 

 sion with indusium complete, with more or less numerous sto- 

 mata; megaspores gray or light gray, warty. 



LlST OF EXSICCATAE ClTED 



The distribution numbers are printed in italic. Collections 

 distributed without numbers are indicated by a dash. The num- 

 bers in parentheses indicate the species numbers in the present 

 revision. 



Allard (51). Balfour (51). 



Allen - - (42); (50); (55). Ball - - (25); - - (62). 



Anderssen (40). Ballard - (6). 



Andrews (48a). Barber 394 (42). 



Archer , (23). Barbour - (58). 



Aresehoug - - (51). Bardell - - (50). 



Arrhenius (40). Barsali 401 (62). 



Arthur, Bailey, Holway B413, B87 (42). Battey - (42). 



Arsene 3653 (37). Beardslee & Kofoid - - (58). 



Ashe 1092, 812, -- (58a). Bergesen - - (51). 



Asehersou (7) ; - - (16); - - (51); Bessey 1 (52); 2 (35). 



(62). Best - - (48a). 



Ascherson & Beinhardt (16); Best & Crawford -- (48a). 



(25a); - - (62). Billot (51); 2890 (62). 



Austin 3 (58). Biltmore Herb. 4264, 42641* (29); 



Balansa 1560 (62); 1327 (25a) ; 849 55641 (58). 



(25); (10). Bishop - : (42); (58); (42a). 



