968 



Plant-formations, ii. 8%. 

 Plant growth and crystal growth, i. 5bi 

 Plant-lice, parthenogenesis, ii. 4(34. 

 Plant-members, fundamental forms, 11. 591. 

 Plant-migrations, nature of, ii. 904, 908. 

 Plants, absorption of organic matter, L W. 



adaptation to climatic conditions, i. KA- 

 to illumination, i. 384. 



to life in rapidly-flowing water, 11. HW. 



to life in very dry climate, i. 317. 



advantages of alpine habit, ii. 510. 



Alpine, absorptive cells, L 90. 

 dwarf habit, i. 523. 



flowering and flowerless shoots, i. 652. 



protection of stomata by hairs, i. W. 



with rolled leaves, reason for being 



generally evergreen, i. 304. 



amphibious, characteristics, ii. 501. 

 transitional nature of, i. 75. 



anatomy of, Nehemiah Crew's, i. 22. 



and animals as a symbiotic community, i. 



254. 



and animals, difference between, i. 504. 

 no boundary-line, i. 54 ; ii. 620. 



and humble-bees as marauders, ii. 239. 



and injurious quantities of minerals, ii. 



498 



and selective food-absorption, ii. 497. 



anemophilous, ii. 129. 



annual, and lack of moisture, ii. 500. 

 no scale-leaves, i. 623. 



origin of flower-stalk, ii. 737. 



aquatic, characteristic of tissues, i. 424. 

 devoid of cuticle, i. 309. 



nourishment of, i. 56. 



pollen and pollination, ii. 105. 



spiny leaves, i. 438. 



Arctic, with evergreen rolled leaves, 



304. 



as agents in accumulation of various 



mineral substances, i. 261. 



both anemo- and entomophilous, ii. 328. 



bulbous, and cold, i. 551. 



arrangement of leaves for rain, i. 94. 



distribution and habitats, i. 651 



time of appearance in dry regions, i 



318. 



burning, i. 553. 



carnivorous in minor degree, i. 155. 



number and classification, i. 119. 



spiuous structures in pitfalls, i. 124 



with adhesive apparatus, i. 153. 



classes, orders, and genera of, i. 6. 



classification, Linnean system, ii. 86. 



classified from habitat, i. 55. 



climbing, relative distribution, i. 671. 



composed of cell aggregates, division o 



labour in, i. 269. 



considered from point of view of descrip 



tion and classification, i. 3. 



defenceless, protected by others, i. 451. 



distribution and heat, i. 527. 



division of labour, i. 567. 



effect of covering with earth, ii. 507. 



entomophilous, ii. 129. 



evolution, and classification, ii. 607. 



fossil, agents in preservation, ii. 612. 



freezing of, i. 539. 



glabrous in the North of Europe becom 



hairy in the South, i. 318. 



grouping according to substratum, ii. 49 



heterophyllous, i. 668. 



heterostyled, ii. 302. 



influence of habitat on protection 



stomata, i. 293. 

 of mutilation, ii. 515. 



land, absorption of carbonic acid, i. 368. 



lithophytic. See Lithophytes. 



luminous, i. 502. 



main divisions, ii. 617. 



maintenance of free passage for wat 



vapour in, i. 290. 



mechanical changes effected by, i. 265. 



metamorphosis of, compared to that 



insects, i. 12. 



multicellular, transportation of materia 



i. 466. 



INDEX. 



ants, myrmecophilous, ii. 233. 



Natural History of, by Theophrastus, 300 



B.C., i. 3. 

 of Arctic regions, not hairy, explanation, 



i. 316. 

 of steppes and prairies, varnish-like 



covering, i. 313. 

 on bark, nutrition of, i. 106. 

 parasitic, no root-cap, i. 764, 

 - seedlings of, i. 173. 

 perennial, functions of roots, i. 781. 

 phyllogeny, views concerning, ii. 607. 

 poisonous, and odour, i. 431. 

 preservation in snow and ice, i. 262. 

 protection against animals, i. 430. 

 from freezing, i. 546. 

 resistance to cold, ii. 489. 

 resting condition, i. 512. 

 selection of food-salts, i. 69. 

 silica-loving, i. 74. 

 sleep of, i. 534. 

 spinose, i. 435. 



stinging, and grazing animals, i. 442. 

 submerged, i. 668. 

 absence of hairs, ii. 502. 



succession and crowding-out of generation 



after generation, i. 268. 



of forms in steppes, Mediterranean 



district, and at Cape, with regard to 

 hairiness, i. 318. 



succulent, extrusion of water by leaves, 



i. 271. 



fewness of stomata, i. 280. 



heat resistance, i. 554. 



majority have thick cuticle, i. 309. 



not eaten by animals, i. 432. 



time of appearance in dry regions, i 



318. 



summer sleep, i. 356. 



swimming, i. 669. 



symbiosis with ants, ii. 233, 243. 



synthetic activity, i. 378. 



thawing of, i. 542. 



tuberous, and cold, i. 551. 



distribution and habitats, i. 654. 



two main subdivisions, i. 592. 



umbelliferous, water receptacles, L 156. 



unicellular, absorption of food, i. 269. 

 transportation of materials, i. 466. 



utilitarianism, i. 421. 



utilitarian view of, i. 1. 



"viviparous", ii. 445. 



wax on upper leaf -surfaces, i. 292. 



weapons of, i. 432. 



weaving, armature, i. 676. 



winter resting, i. 562. 



with cladodes, i. 333, 335. 



with evergreen rolled leaves, conditions o 



life, i. 305. 



with explosive flowers, ii. 268. 



with rolled leaves, at Cape, localization oi 



i. 306. 

 wide distribution of, i. 303. 



with sticky foliage, ii. 236. 



with two-coloured leaves, habitats of, i. 293 



woody, time of appearance in dry regions 



. 318. 



Plant-species, isolated colonies, i. 527. 

 Plant succession and substratum, ii. 498. 



world and its history, ii. 3. 

 Plasmodia, behaviour towards light, i. 32. 



food-absorption, i. 113. 

 Plasmodiophora Brassicse, ii. 619. 



galls on Brassica oleracea, ii. 522. 



Plasmopora viticola. See Peronospora vit 



cola. 



Plastic materials, solid, conduction and trans 

 formation, i. 481. 



storing of, i. 479. 



withdrawal from leaves in autumn, 



Platanus, age, i. 720. 



pollen storing and dispersion, ii. 146. 



pollination, ii. 133. 



protection of pollen, ii. 117. 

 Platanus orientalis, dimensions, i. 722. 

 Plate, nuclear, i. 581. 



latycerium alcicorne, ii. 475. 

 epiphytic, ii. 705. 

 sterile and fertile fronds, ii. 476. 



Lectocomia elongata, inflorescence, i. 745. 



leodorina, structure, ii. 633. 



leurocarpous Moss, ii. 702. 

 'leurococcacese, description, ii. 636. 



symbiosis with animal and vegetable or- 



ganisms, ii. 637. 



leurococcus vulgaris, structure, &c., ii. 636. 

 liny, Historia naturalis, ii. 1. 



plant-forms known to, ii. 600. 

 loner See, biological station, ii. 622. 



'lum. See Prunus communis. 

 lumbaginacese, ii. 770. 

 'lumbago capensis, sticky fruit, ii. 870. 

 'lumbago europaea, flower, ii. 236. 

 'lusia chrysitis, victim of Araujia, ii. 260. 

 3 lusia precationis, victim of Araujia, ii. 260. 

 'oa, bulbils, ii. 818. 



pollination, ii. 142. 



Poa alpina, plant with bulbils, ii. 445. 



>oa annua, anthocyanin in glumes, i. 522. 

 habit and elevation, ii. 512. 



?oa laxa, vertical range, ii. 746. 



'ocket-galls, structure, ii. 531. 



'ocket-plums, cause of, ii. 524.' 



3 od, nature of, ii. 432. 



'odophyllum, anthocyanin, i. 484. 



'odophyllum peltatum, emergence of leaf 



from soil, i. 639. 

 protection of pollen, ii. 127. 



?odosphsera, development of embryo, ii. 60. 



^odostemacese, ii. 757. 



adaptation to environment, i. 424. 



in rushing water, i. 79. 

 ?oison, of stinging hairs, i. 441. 



Poisons, protective, i. 431. 



Polar expeditions, temperature observations, 



i.547. 



Polarization, and cell-wall, i. 568. 

 Polar nuclei, and endosperm formation, ii. 



421. 

 Polemoniacese, ii. 771. 



autogamy in, ii. 384. 



dichogamy ha, ii. 312. 

 Polemonium, nectary, ii. 175. 

 Pollarding, object of, ii. 37. 

 Pollen, abortive, ii. 403. 



amount in anemophilous plants, ii. 151. 



and guidance to honey, ii. 248. 



behaviour in cleistogamous flowers, ii. 392. 



collection by insects, ii. 133. 



contrivances for removal from anther, ii. 



359. 



deposition, ii. 277, 280. 



dispersal, ii. 103. 



explosive ejection, ii. 137- 



expulsion in certain Papilionacese, ii. 260. 



foreign, possible influence in variation, ii. 



593. 



insect food, ii. 167. 



mixing on stigmas, ii. 403. 



morphological value, ii. 85. 



poverty in honey-bearing flowers, ii. 169. 



prepotency of, ii. 406. 



protection from rain and dew. ii. 107. 



protection from wet, ii. 109, 121. 



retention after deposition, ii. 282. 



storage of, ii. 94, 146, 147. 



times of discharge, ii. 142. 



transference in Asclepiadacese, ii. 257. 

 to insects, ii. 243, 247. 



transport, by egg-laying insects, ii. 157. 

 direction of, ii. 136. 



Pollen-cell, division of contents in Conifene, 

 ii. 420. 



effect of wetting, ii. 106. 



Pollen-cells, differences in heterostyled 



flowers, ii. 405. 

 Pollen-grain, functional adaptations, ii. 103. 



germination in Gymnosperms, ii. 420. 



germination on foreign pistil, ii. 414. 



=microspore, ii. 478. 



Pollen-grains, ii. 98, 99. 



dimensions, ii. 97. 



formation, ii. 96. 



