FLOWER POLLINATION 307 



2220. MoKenney, Randolph E. B. Observations on the development of some embryo- 



sacs. Cont. Bot. Lab. Univ. Pa., Philadelphia (Pa.), ii, 1898, pp. 80-6. 



2221. M., D. P. Fuchsia and Bees. Science Gossip, London, 1885, p. 263. 



2222. Meads, M. E. The range of variation in species of Erythronium. Bot. Gaz., 



Chicago (111.), xviii, 1893, pp. 134-8. 



2223. Medious, Friedrich Kasimir. Botanische Beobachtungen. Mannheim, 1783, 



1784. 



2224. Pflanzenphysiologische Abhandlungen. Leipzig, 1803. 



2225. tJber den merkwiirdigen Bau der Zeugungsglieder einiger Geschlechter aus der 



Familie der Contorten. Mannheim, 1782. 



2226. Von der Neigung der Pflanzen sich zu begatten. Comment. Acad. Theodoro- 



Palatinae, Mannhemii, III, 775. Physicum, pp. 116-92, 266-70. 



2227. Meehan, Thomas. On the Structure of Lopezia. Proc. Acad. Nat. Sci., Phila- 



delphia (Pa.), 1867, pp. 33-4. 



2228. On dioecious Forms of Vitis vinifera Z. Op. cit., 1867, pp. 42, 98, 99. 



2229. Variations in Epigaea repens. Op. cit., 1868, pp. 153-6. 



2230. Monoecism in Luzula campestris. Op. cit., 1868, p. 156. 



2231. Mitchella repens L., a dioecious Plant. Op. cit., 186S, pp. 183-4. 



2232. On the Sexes of Plants. Proc. Amer. Assc. Adv. Sci., Salem, xviii, 1869, 



pp. 256-60 ; Belg. Horticole, Lidge, xx, 1870, pp. 178-82. Ab. : Gard. Chron., 

 London, 1870, p. 243. 



2233. Cross-fertilization and the law of Sex in Euphorbia. Proc. Acad. Nat. Sci., 



Philadelphia (Pa.), 1870, pp. 14-15 ; Ann. Mag. Nat. Hist., London, vi, 1870, 

 pp. 191-2. Ab. : Gard. Chron., London, 1870, pp. 922-88. 



2234. On Objections to Darwin's Theory of Fertilization through Insect Agency. 



Proc. Amer. Ass. Adv. Sci., Salem, xix, 1870, pp. 280-2. 



2235. On two classes of Male Flowers in Castanea. Op, cit., xix, 1870, pp. 282-3. 



2236. On the Flowers of Aralia spinosa L. and Hedera Helix L. Proc. Acad. Nat. 



Sci., Philadelphia (Pa.), 1870, pp. 107-8. Ab.: Ann. Mag. Nat. Hist, London, 

 Ser. 4, vii, 1871, pp. 315-6. 



2237. On the lever-like anthers of Salvia. Amer. Nat., Boston (Mass.), v,i 871, pp. 782-3. 



2238. The Agency of Bees in obstructing Evolution. Op. cit., vi, 1872, pp. 235-7. 



2239. On Hermaphroditism in Rhus cotinus and in Rhus glabra. Proc. Amer. Ass. 



Adv. Sci., Salem, xxii, 1873, pp. 73-5. 



2240. Influence of Pollen in Cross-fertilization. Proc. Acad. Nat. Sci., Philadelphia 



(Pa.), 1873, PP- 16-7. 



2241. Flowers of Viola and Impatiens. Op. cit., 1873, p. loi. 



2242 Cleistogamous Flowers in Viola striata. Amer. Nat., Boston (Mass.), vii, 1873, 

 p. 563. 



2243. Fertilization of Pedicularis Canadensis. Proc. Acad. Nat. Sci., Philadelphia (Pa.), 



XXV, 1873, p. 287. Ab.: Nature, London, viii, 1873, P- 59 5 Ann. Mag. Nat. 

 Hist., London, Ser. 4, xii, 1873, p. 497. 



2244. Insects as Florists. On the agency of insects in obstructing evolution. Gard. 



Chron., London, 1873, PP- 949""5o; Proc. Acad. Nat. Sci., Philadelphia (Pa.), 

 1873, pp. 235-7. 



2245. Dimorphous Flowers in Passiflora. Proc. Acad. Nat. Sci., Philadelphia (Pa.), 



xxvi, 1874, p. 9. 



2246. Fertilization of Gentiana. Op. cit., 1874, p. 160. 



2247. Are Insects any material aid to plants in fertilization ? Proc. Amer. Ass. Adv. 



Sci., Salem, xxiv, 1875, pp. 243-51; Philadelphia Press, Aug. 13, 1875; 

 Gard. Chron., London, New Ser., iv, 1875, p. 327 ; Arch. Sci. Phys., Geneve, 

 Ivi, 1876, pp. 294-6. 



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