1922] 



PFEIFFER — MONOGRAPH OF THE ISOETACEAE 



215 



Piper & Ilungate 



(53). 



Piper & Smith 651 (53). 



PL Seculae 242 (15). 

 Poring — 



— (51). 

 Porter 1953 (42); 



Poyser — 

 Praesrer — 



(58). 



Pringlr 



(48). 

 (54). 



— (35); 

 13861, 6660 



1447 



1713, 8796, 



3459, 13261, 6660 (37); 

 (42a) ; 3333 (49) ; 

 ( 54a ) . 



Rabenhorst 105 



(52) 



(34); 



Rand 



(42); 



(15). 



,2,3 (54); 



(55). 



Rand & Redfield 31 .'1 (55). 



Rand cV Robinsm 927 (42). 

 Ran — (48). 



Redfield 2530 (42) ; 2 



Kress — 



rw 



9 



6 (54). 



L inliardt 

 Roinke - 



Reinsch 

 Better - 



(40); 



(51). 



Reveliere 



- (16). 

 (51). 



(51). 



(51). 



- (15);- 



(25). 



(15). 



Beverchon 1177, 795, 3551, 3549, 

 (38); - (62); - (25); 



Rid. — (42); — (58). 

 Robbins — (42); — , 7, 8, 9, 11, 

 (48); W (48a); — (54); 13 (58). 



Robinson 335 (42). 



Robinson & Schrenk 239 



14 



Rodway 



(19). 



(55). 



Eolland 6284, 65 (42); 6230 (48a). 

 Rose & Painter 8168, 8216 (58). 

 Rosendahl 2050 (42a). 

 Ross 



800 (62). 

 (5). 

 (31). 



Rovle — 



Rugel — 



Russell — (42). 



Ruth & Ruth — (42) ; 



Rydberg & Bessey 85H0 

 St. John 90061, 90059, 

 1370, 1371, 630 



- (58). 

 (35). 



90060, 90058, 



(42). 



Sanford 38 (42). 



Sargent 27 (42). 

 Schildknecht & Thiry 



Sehliekum — 



(40). 



Schmoll — 

 Schonland - 

 Rchrenk — 

 Sehnltz 778 



- (40). 

 (35). 



(61). 



(42). 



(11); 395, 395b (12); 



(3). 

 (54). 



781 (25). 



Schweinfurth 



Schweinitz — 



Sennen — (6). 



Seyn our 1017 (55) ; 

 Shoekley — (52). 



Shull 66, 67, 296, 305, 200, 201, 252 

 (47). 



Shuttleworth 



(58). 



(62). 



492, 747 (26). 



(42) 



(48) 



Smiley 

 Smith 

 (58). 



Soc. Bot. Edin. 183 (51). 

 Soc. Cenoin. Exsicc. 482 



Solms & Reesa 



Spruce 

 Stahl • 



(53); 



(42); Steele 



(21). 



(40). 

 (47). 



(40). 



(6). 



(55). 

 (40); 



Stone 

 Study 



Sturtevant — (^)* 



Suksdorf 2369, 833, 



2372 



(51). 



1235, 



642, 



2614, 



(35) 

 2367 



\ 



2617 

 2615, 

 22 / 



(34a). 



■ (48). 



2370, 950, 

 $613, 2479, 2616, 

 (34); 

 4443 



2368, 



2618, 

 917, 2373, 2364, 



(26); 



2375 



(42) ; 2371, 2365, 2366, 



Swan — 

 Tatnall 

 Thaxter 

 Thiry 



Thomas 

 Thompson — 

 Thompson & 



(27). 

 Thurber — 



- (58). 



- (55). 

 (40). 



(56). 



(26); - 

 Thompson 



(58). 



(27); 



(34). 



(34); 



1262. 1261. 1263 



Thurow 15 (38). 

 Tideslrom — (47). 

 Trelease — (35) ; 

 (59). 



Tuckerman — (55). 

 Tuerckheim 3531 (36). 



417 (35) ; 416 (52). 



86 1, 



(34). 



Tweedy — 

 Umbaeh — 



Underwood 

 (42a); - 

 Underwood & Cook 



Vaccari 503 



Vahl — 



Van den Born 



29); 



(42); 



(54) ; 



(58). 



(42a). 



(25). 



(42). 



(51). 



(40). 



Varnberg — 



Vasey — (38). 



Vasey & Coville — (47). 



Victoria — , 61, 694 (42) 



Violleau 427 (12). 



von Schrenk W 





 (42). 



(0). 



Vroom — 



Walker-Arnott 

 Wanderley — 



Ward — (58). 

 Ware 724 (42). 



Warion 189 (15); 



(10). 



Watanabe — (60). 



Waters — (42). 



Watson 1371 (42). 



Webster — (53). 



Weddell 16 (10). 



(58). 



(51). 



187 (25); 188 



