8504 Oligotrichum ineurvum—Oseillatoria nitida 
Oligotrichum incurvum (MHuds.) | Origanım vulgare 437 
Lindb. 659 Orites excelsa 334 
Olpidium endogenum A. Br. 33 Ormosia dasycarpa 360 
Omphalanthus subalatus Lindb. et Ornithidium divaricatum 401 
Gottsche 705 Ornithocereus 64, 141. — N. A. 189 
Oncobyrsa Elenkin N. @&. 43, 173 Orobanche ramosa 553 
— sarcinoides Elenk.* 43 — rapum 557 
— — var. fulvo-cubica* 43 Orthodieranum 724 
— —- var. irregulariter-consociata Orthodontium 661 
Elenk.* 43  Orthoneis binotata Grun. var. quadrio- 
— — — /. fusca Elenk.* 44 eularis Fosti* 166 
— — — /. pallida Elenk.* 44 — punctatissima 41 
— — var. sparsa Elenk.* 44 Örthorrhynchium chilense Williams* 
Oniscus asellus 411 709 
Onobrychis crista-galli 482 Orthothecium intricatum (Hartm.): 
— Zsatıva 563 Br. eur. 661, 682 
Onoclea struthiopteris 272 Orthotrichum 708 
Onopordon acanthium 360 — Braunii 733 
Onychonema 81 ı — columbiecum 734 
Oocardium 81, 151. — N. A, 207 — diaphanum 734 
Voeystis 166. — N. A. 217 | — Jamesianum 733 
— exigua van Goor* 24 — papillosum 734 
Oocystis submarina Lagerh. var. ob- _ —- pulchellum leucodon 734 
longa varı Goor* 24 ı — rivulare 734 
Oospora lactis 358 | — Schawii Wils. 669 
Opalina ranarum 579 ı — speciosum 734 
Opegrapha N. A. 15 Oryza sativa 602, 617 
Opercularia vaginata 454 Oscillaria 148 
Ophioglossum vulgatum 307 — tenuis 143 
Ophrys 428, 447 Oscillatoria 25, 47, 48, 49, 53, 62% 
— apifera 398, 399, 412, 419, 420, 136. — N. A, 173 
447 — Agardhii 48 
— arachnitiformis Gren. et Phil. 420 | — amphibia 45, 48, 627 
— aranifera 412 — angusta Koppe* 120 
— Botteroni 431 — animalis 48 
— fusea 447 — brevis 36 
— lutea 409, 447. — chlorina 48 
— muscifera 399, 412 — eoerulescens Gickelhorn* 47 
— myodes 289 — corallinae 131 
— speculum 409, 447 — eurviceps 48 
Opulaster 408 — formosa 36, 48 
Opuntia 352, 458 — geminata 48 
Orchis 349, 419, 455 — jenensis 48, 52, 53, 621 
— lactea 420 — laetevirens 48 
—- maculata 408 —. ]imosa 23, 40, 42, 48 
— mascula 418, 419 — — var. disperso-granulata 
—- morio 319, 418, 419 Schkorb.* 52 
— Traunsteineri Saut. 283, 319, 339 | — minima Gickelhorn* 47 
Öreoweisia serrulata 733 — neglecta 48 
Oreoxis alpina 430 — .nitida Schkorb.*_52 
