204 
Piptadenia foliosa Bth. — Plantago missourensis Steud. 
— foliosa Bth. 47, 229 
— laxa Bth. 47, 229 
— Schumanniana Taub. 75, 75 
Piptocephalis de By., Sporenbildung. 66, 
262 
Pipturus albidus Gray. 57, 547 
Pirotta, R., Personal. 64, 31 
Pistacia Lentiscus auf Chios. 43, 713 
—, Lebensdauer. 97, 405 
Pistia, Revision. 36, 580 
Pistiaceae, Übersicht. 36, 577 
Pistille, Geraniaceae. 47, 401 
—, Metamorphose bei Salix. 26, 782 
Pistoja, Vegetation. 49, 97 
Pisum sativum, Ranken. 49, 375 
—, Morphologie. 43, 92 
—, Variation. 31, 64 
Pitcairnea bracteata Aifc. var. fulgens Reg. 
36, 451 
— ringens Reg. 36, 450 
Pithecolobium Brongniartii Duchass, et 
Walp. 36, 232 
— oblongum Bth. 36, 231 
— Saman Bth., altes Expl. in Nicaragua. 
53, 46 
-, Wurzelsystem. 95, 83 
Pithophora clavifera Schmidle. 83, 304 
Pittosporum cauliflorum Mann. 56, 168 
— dasycaulon Miq. 36, 765 
— discolor Rgl. 35, 177 
— terminalioides Planch. var. glabrum 
Hook, et Arn. 56, 168 
-var. spathulatum Gray. 56, 169 
Placenta, Entwickelungsgeschichte. 73, 62 
—, —, Abietineae. 68, 519 
Placidiopsis Custnani Mass. 68, 65 
Placidium cartilagineum Nyl. 68, 63 
-f. daedaleum Krph. 68, 63 
— compactum Mass. 68, 64 
— hepaticum Ach. 68, 64 
— Michelii Mass. 68, 64 
— monstrosum Ach. 68, 65 
— rufescens Ach. 68, 63 
—, spp. crit. 41, 532 
Placodium cerinoides Anzi. 59, 239 
— concolor var. angustum Arn. 58, 60 
— cretaceum Müll. Arg. 50, 434; 55, 465 
— deminutum Müll. Arg. 71, 204 
— dissidens Nyl. 58, 298 
— Ferdinandi Müll. Arg. 64, 508 
— fulgidum Nyl. 48, 212 
— glebulare Müll. Arg. 71, 204 
— gracile Müll. Arg. 58, 61 
-f. atratum Müll. Arg. 58, 61 
-f. amoenum Müll. Arg. 58, 61 
— Lorentzü Müll. Arg. 72, 510 
— microcarpum Colm. 52, 501 
— obliterans Nyl. 57, 7 
— radiosum Hoff. f. myrrhinum Fr. 70,149 
— saxicolum Krph., Apothecien. 71, 473 
— subcandicans Müll. Arg. 57, 529 
— subglebosum Müll. Arg. 72, 510 
— tenuatum Nyl. 62, 202 
— thaeodes Müll. Arg. 62, 290 
— variegatum Colm. 52, 501 
—, fränkisches Jura. 67, 311 
—, Reaktionen. 54, 193 
—, spp. crit. 41, 305; 43, 66; 44, 606 
Placophora Binderi, Entwickelung. 72, 3 
Placyntliium, fränkisches Jura. 67, 239 
Plagiochasma Aitonii, Sporen. 79, 360 
—, Sporogonium. 86, 183 
Plagiochilla asplenoides, Regeneration. 
79, 373 
Plagiogyria Mett. 41, 664 
Plagiophototaxie. 75, 207 
Plagiophototropie. 75, 231 
Plagiopteron Griff. 27, 437 
— suaveolens Griff. 27, 437 
Plagiothecium denticulatum L. var. her- 
cynicum Jur. 55, 239 
— Schimperi Jur. et Mlde. 47, 90 
—, spp. varr. 40, 70 
—, — in Oberbayern. 44, 331, 337 
Plagiotrema lageniferum Müll. Arg. 68, 251 
Plagiotrope Sprosse, Heliotropismus. 83, 23 
Plagiotropie, Sprosse, Cucurbita Pepo. 
85, 425 
Planchonia undulata Tsm. et Bnnd. 49, 438 
Plankton, Variationsstatistik der Kompo¬ 
nenten. 91, 380 
Plantae intermediae. 31, 42 
Plantaginaceae, Embryosack. 27, 793; 
86, 61 
—, Revision. 30, 170 
Plantago abyssinica Höchst. 32, 413 
— albicans L. 32, 414 
— argentea Steud. 32, 412 
— Berteroniana Steud. 32, 407 
— bonariensis Steud. 32, 408 
— clausa Steud. 32, 407 
— cvlindrica Forsk. 32, 411 
— decumbens Forsk. 32, 411 
— elata Steud. 32, 413 
— eriopoda Torr. 32, 415 
— Ferdinandeziana Steud. 32, 406 
— ? Frankii Steud. 32, 409 
— hygrophila Steud. 32, 403 
— intermedia Steud. 32, 414 
— leonensis Steud. 32, 404 
— macrosperma Steud. 32, 405 
— major, Mißbildung. 29, 530 
— maritima, Schleim. 58, 193 
— marginata Steud. 32, 407 
— media, Blutung des Blütenschaftes. 
64, 93 
-, ehern. Untersuchung. 30, 200 
— missourensis Steud. 32, 409 
