244 



Pearson, H[enry] H[arold] W[elch]. 

 Itinerary of the Percy Sladen Memorial 

 Expedition to the Orange River 1910- 

 1911 (Report No. 7). Cape Town Ann. 

 S. Afr. Mus. 9 1911 (21-90 with 2 pis.). 

 [0020 0060 5400 8000 /gr 8500]. 



67558 



Through Little Namaqua- 



land with the vasculum and the camera. 

 Gard. Chron. London (Ser. 3) 50 1911 

 (61-62 124-125 166-167 190-191 200- 

 201 figs. 30-33 57-61 79-81 89-91 

 97-99). [5000 8000/9-]. 67559 



Dr. Harry Bolus. Kew 



Bull. London 1911 (319-322). [0010]. 



67560 



and Stephens, E. L. 



Portulacaceae. List of the plants 

 collected in the Percy Sladen Memorial 

 Expeditions 1908-9, 1910-11. Cape 

 Town Ann. S. Afr. Mus. 9 1911 (30- 

 35). [5400 8000 /sr]. 67561 



Pearson, W[illiam] [Henry]. Aplo- 

 zia rivularis Schiffner [in Derbyshire]. 

 J. Bot. London 49 1911 (349). [8000 c?e]. 



67562 



Pease, Arthur Stanley. Helianthus 

 subrhomboideus in New Hampshire. 

 Rhodora Boston 13 1911 (103). [5400 

 8000 gg]. 67563 



[Pedenko B. F.] lleMeiiKO, B. <I'. 

 K-b BOiipocy CTpoeHiii OaKiepiii. 

 Drepanospira Millleri n. g. n. sp., 

 napasHTt napaMeiiin, CTpoeaie ero 

 H miKJit pasBHTia. [Zur Frage 

 iiber den Bau der Bakterien. 

 Drepanospira Millleri n. g. n. sp., 

 ein Para,sit der Paramaecien, sein 

 Bau und seine Entwickelung.] Var- 

 sava Prot. Obsc. jest. 23 (1911) 1912 

 (1-46 mit 49 Fig.) ; Arch. Protisten- 

 kunde Jena 22 1911 (248-298). [7700]. 



67564 



P6choutre, F[erdinand]. Revue 



annuelle de botanique. Rev. gen. sci. 

 Paris 22 1911 (160-170). [0032 



0010]. 67565 



Peckolt, Th[eodor]. Heil- und 



Nutzpflanzen Brasiliens. Combre- 



taceae. Bignoniaceae. Caryocaraceae 

 (Rhizoboleae). Berlin Ber. D. pharm. 

 Ges. 21 1911 (273-279 346-367). 

 [.5400 3120 8000 hli\. 67566 



Pedersen, P. M. Fund af sjaeldne 



Planter. [Finds of rare plants.] 



K0benhavn Flora og Fauna 1911 



(35-37). [8000 cZa]. 67567 



Peglion, Vittorio. Intorno alio 



svernamento dell'oidio della quercia. 

 Roma Rend. Ace. Lincei (Ser. 5) 20 

 1911 (505-507). [4050]. 67568 



Intorno alio sveniamento 



di alcune Erisifacee. Roma Rend. Ace. 

 Lincei (Ser. 5) 20 1911 (687-690). 

 [4050]. 67569 



Peirce, George J[ames]. An effect 

 of cement dust on orange trees. Plant 

 World Tucson Ariz. 13 1910 (283- 

 288). [4000]. 67570 



American botany. Plant 



World Tucson Ariz. 14 1911 (81-87). 

 [0040]. 67571 



Civilization and vegeta- 

 tion. Pop. Sci. Mon. New York 79 

 1911 (328-336). [3200]. 07572 



Peirson, Henry. Mentha cilrata 

 Ehrh. in Herts. J. Bot. London 49 

 1911 (346-347). [8000 de]. 67573 



Abnormal development 



in maize. J. Bot. London 49 1911 

 (347-348). [1800 6000]. 67574 



Peklo, Jaroslav. Epifyticke myko- 

 rhizy. II. Carpinus Betulus a Fagus 

 silvatica. [Epiphytische Mykorhizen. 

 II. Carpinus Betulus u. Fagus silva- 

 tica.] Prag Rozpr. Ceske Ak. Frant. 

 Jos. 1910 (81 mit 2 Taf.). [3235 7700 

 5400]. 67575 



Mykorrhizy a humus. 



Vyznam mykorrhiz pro lesni hospo- 

 dafstvi. [Mykorrhizen und Humus. 

 Ihre Bedeutung fiir die Waldwirt- 

 schaft.] Prag Rozpr. 6eske Ak. 



Frant. Jos. 1910 (50). [3235 7700]. 



67576 



Pellegrin, F[ran9ois]. Sur les genres 

 Aglaia, Amoora et Lansium. Notulae 

 system. Paris 1 1910 (289-290). [5400 

 8000 ed]. 67577 



Sur les collections bota- 



niques faites par le capitaine Periquet 

 dans le Haut Logone. Bui. Museum 

 Paris 1911 (357-361). [5000 8000 /e]. 



67578 



— — Turraea nouveau de 



I'Afrique occidentale. Notulae system. 

 Paris 2 1911 (13-14). [5400 8000 /c]. 



67579 



Sur les genres africains 



Bingeria et Turraeantlms. Notulae 

 system. Paris 2 1911 (14-17). [5400 

 8000 /]. 67580 



