5M 



Typhaceae, 444- 

 Typical diagram, 414. 



Udotea, 30. 



Ulmaceae (Celtideae), 468. 

 Ulmus, seed, 392. 

 Ulothricaceac, 42. 

 Ulothrix, 41, 67 ; develop- 

 ment, 42 ; germination, 

 43 ; reproduction, 42. 

 Ulva, 41. 

 Ulvaceae, 41. 

 Umbel, 407. 



Umbel! iferae, 470 ; endo- 

 sperm, 395 ; fruit, 427 ; 

 inflorescence, 411; invo- 

 lucre, 353; nectaries, 381; 

 ovule, 382; protandry, 

 405 ; seed, 445 ; stem, 

 465, 466. 



Umbelliflorae, 470. 

 Umbellule, 407. 

 Umbilicaria, spores, 122. 

 Umbraculum, thallus, 147. 

 Unicellular plants, 29. 

 Unisexual, 303. 

 Uredineae, 82, 83, 126; aeci- 

 diospores, 126 ; develop- 

 ment, 126, 127 ; gonidia, 

 83; habitat, 128; place 

 in system, 84 ; propaga- 

 tion, 82, 83 ; spermatia 

 and spermogonia, 127, 

 128 ; sporidia, 127 ; teleu- 

 tospores,'i 2 7 ; uredospores, 

 127. 



Uredospores, 83, 127. 

 Urn (Mosses). See Theca. 

 Urocystis, 86, 87. 

 Urocystis occulta, 87. 

 Uromyces, teleutospores, 



127, 128. 



Uromyces appendiculatus. 

 See Aecidium Legumino- 

 sarum. 

 Uropedium, floral diagram, 



415. 



Usnea, soredia, 124, 125. 

 Usnea barbata, 118, 119; 

 soredial branches, 124. 

 (Figs. 75, 79, 83.) 

 Ustilagincae, 13,85; habitat, 

 85, 86; place in system, 

 84, 85, note 4. 

 Ustilago, 82, 86, 87. 

 Ustilago antherarum, 86. 

 Ustilago Carbo (Smut), 86, 



87. (Fig. 53.) 

 Ustilago longissima, 87. (Fig. 



53-) 



Ustilago Muidis, 86, 87. 

 Ustilago Tragopogonis, 87. 



(Fig. 53-) 

 Utricularia, adventitious 



INDEX. 



shoots, 452 ; dorsiventral 

 organs, 451 ; embryo, 446. 



Vacciniaceae, 471. 

 Vaccinium, endosperm, 461. 

 Vaccinium Vitis Idaea, 132. 

 Vaginula, 177, 184. 

 Valeriana, inflorescence, 302. 



(Fig. 384-) 



Valerianeae, 472 ; flower, 

 422; inflorescence, 411; 

 stamens, 358. (Fig. 384.) 

 Vallecular canal, 269. 

 Yallisnerieae, 445. 

 Valves (Diatomaceae), 17. 

 Vascular Cryptogams, 189; 

 alternation of generations, 

 189 ; asexual generation, 

 190 ; branching, 191 ; 

 classification, 192 ; homo- 

 logies, 192 ; leaves, 191 ; 

 macrospores, 189; micro- 

 spores, 189 ; roots, 191 ; 

 sexual generation, 189 ; 

 sporangia, 191; spores, 

 189, 192 ; subdivisions, 

 189 ; tissue-systems, 191. 

 Vaucheria, 27, 28, 32, 46; 

 asexual multiplication, 29; 

 brood-cells, 33 ; develop- 

 ment, 32, 33 ; germina- 

 tion, 6, 33; resting-stages, 

 34; stilogonidia, 10 ; struc- 

 ture, 29, 32 ; swarm-spores, 

 33 ; swarm-cells, n. 

 Vaucheria geminata, 32. 

 Vaucheria hamata, 33. 

 Vaucheria pachyderma, 34. 

 Vaucheria piloboloides, 33. 

 Vaucheria sericea, 33. 

 Vaucheria sessilis, 32, 33. 



(Figs. 14, 15.) 

 Vaucheria synandra, 34. 

 Vaucheria tuberosa, 32. 

 Vegetative body, 3. 

 Velum (indusium) in Iso- 



etes, 289. 

 Velum partiale (cortina), 



132. 

 Velum universale (volva), 



132. 



Venter, 141, 175, 176. 

 Ventral canal-cell, 150, 177, 



190. 



Veratrum, inflorescence,407. 

 Verbascum, floral diagram, 



414. 



Verbascum nigrum, Fig. 343. 

 Verbascum phoeniceum, Fig. 



317. 

 Verbascum Thapsus, leaves, 



453- 



Verbena, endosperm, 461. 

 Verbenaccae, 471. 



Veronica, endosperm, 461 ; 

 floral diagram, 414; in- 

 florescence, 411. 



Veronica Chamaedrys, floral 

 diagram, Fig. 343. 



Veronica latifolia, 414. 



Verrucarieae, 124. 



Versatile anther, 354. 



Vibrio, 25. 



Vibrio Rugula, spores, 26. 



Vicia, increase in size, 450. 



Vicia Cracca, inflorescence, 

 406, 410. 



Vicia Faba, embryo, 447. 

 (Fig. 376.) 



Victoria regia, 453. 



Viola, cleistogamous flowers, 

 404 ; fruit, 428 ; inflores- 

 cence, 410 ; nectaries,307, 

 381 ; placentas, 374 ; style, 



379- 

 Viola tricolor, Figs. 312, 323, 



324. 



Violarieae, 469. 



Virgilia lutea, intrapetiolar 

 bud, 451. 



Viscum, 28 ; embryo, 446 ; 

 endosperm, 460 ; epider- 

 mis, 464. 



Vitis, floral diagram, Fig. 

 398; inflorescence, 411; 

 style, 380; tendrils, 451. 



Vochysiaceae, 469. 



Voitia nivalis, stem, 167. 



Volva. See Velum universale. 



Volvocineae, 27, 28, 34 ; coe- 

 nobia,34,36, 37 ; propaga- 

 tion, 28 ; structure, 28, 



34- 



Volvox, 34; development, 

 38 ; fertilisation, 39 ; re- 

 production, 38. 



Volvox globator, 38. 



Volvox minor, 38. 



Watsonia, pollen-tube, 391 ; 

 synergidae, 389. 



Welwitschia, apical growth, 

 312 ; egg-apparatus, 300. 



Welwitschia mirabilis, em- 

 bryo, 342 ; fundamental 

 tissue, 344; habit, 340; 

 hypodermal tissue,345; in- 

 florescence, 340 ; stomata, 

 345; vascular bundles, 



342. 

 Wendungszellen (Chara- 



ceae), 59, 62. 



Wheat, inflorescence, 407. 



Widdringtonia, 339. 



Wimperkorperchen (Chara), 

 64. 



Wistaria chinensis, stem- 

 structure, 466. 



