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Show 294 PERIOD OF FLOWERING OF CnAr. VIII. Species, of whieh the first Plants that flowered were of Self fertilised Parentage. Eschscl10ltzia ca1ifornica (First Geueration).-The crossed plant~ were at first taller than the self-fertilised but on the1·1. "e l d . . . ' , cone growth un?g t~e following year the self-fertilised exceeded the crossed In he1ght, and now they flowered first in three out of the four pots. Lupin us .. z~teus.~Alt~ough the crossed plants were to t11e selffertilised Ill herght as 100 to 82 ; yet in all three pots th self-fertilised plants :flowereJ first. e Clarkin eleqans.-Altl1ough the crossed plant.· were as in the last case, to the self-fertilised in height as 100 t~ 82 yet in the two pots the self-fertilised flowered first. ' Lobelia ful,r;ens (Fi1·st Generation ).-The crossed plants were to the self-fertilised in height on]y as 100 to 127, a.nd the latter flowered much before the crossed. Petunia violacea (~~ird _Generation).-The crossed plants were to the self-fertilised 1n height as 100 to 131, ancl in three out of the four pots a self-fertilised plant flowered first· in the fourth pot simultaneously. ' Petunin violucen (Fourth Generation).-Although the crossed -plants were to the self-fertilised in height as 100 to 69, yet In tbr~e out of the five pots a self-fertilised plant flowered fi~st; In tho fourth pot simultanoou~ly, ancl only in tho fifth did a crossed plant flower first. NicoU((na tabacllm (Fir. t Generation).-The crossed plants were to tl~e. self-fertili ed in height. only as 100 to 17S, and . a. self-fertilised plant flowered fir. t in all four pots. N ·wotutnu tahacum (Third Generation).-The cro::,sed plants ;er~ to the self-~ertilised in height as 100 to 101, and in our out of the five pots a self-fertilised plant flowered first. Canna warscewiczi.-In the three generations taken together the crossed were to the self-fertilised in height as 100 to 101; in the first generation the self-fertilised plants showed some tendency to flower first, and in the third generation they flowered first in nine out of the twelve pots. Species in which the Crossed and Selfjertilised Plants flowered al1nost sim ultaneo~~sly. Mim~d'.'s _lute.us (Sixth Generation).-The crossed plants were InferiOr In height and vigour to the self-fertilised plants, CHAP. VIII. CROSSED AND SELF-FERTILISED PLANTS. 295 which all belonged to the new white-flowered tall variety, yet in only half the pots did the self-fertilised plants flower first, and in the other half the crossed plants. · Viscar1:a ocul!J.trt. -The crossed plants were only a little taller than the self-fertilised (viz., as 100 to 97), but considerably more fertile, yet both lots flowered almost simultaneously. J.athyrus odorrdus (Second Generation).-Although the crossed plants were to the self-fertilised ~n height as 100 to 88, yet there was no marked difference in thei.r period of flowering. Lobelia fulgr:ns (Second Generation).--A1though tho crossed plants were to the self-fertilised in height as 100 to 91, yet they flowered simnltaneously. . Nicotiunct tabacurn (Third Generation).-Although the crossed plants were to the self-fertilised in height as 100 to 83, yet in half the pots a self-fertilised plant flowered first, and in the other half a crossed plant. These three lists include :fifty-eight cases, in which the period of flowering of the crossed and self-fertilised plants was recorded. In forty-four of them a crossed plant flowered first either in a majority of the pots or in all; in nine instances a self-fertilised plant flowered first, and in :five the two lots flowered simultaneously. One of the most striking cases is that of Cyclamen, in which the crossed plants flowered some weeks before the self-fertilised in all four pots during two seasons. In the second generation of Lobelia ra1nosa, a crossed plant flowered in all four pots some days before any one of the self-fertilised. Plants derived from a cross with a fresh stock generally showed a very strongly marked tendency to flower before the selffertilised and the intorcrossod plants of the old stock ; all throe lots growing in the same pots. rrhus with Mimnlus and Dianthus, in only one pot out of ten, and in Nicotiana in only one pot ont of sixteen, did a selffertilised plant flower before the plants of the two crossed kinds,-these latter flowering almost simultaneously. |