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Show VISOARIA OOULATA. CHAP. IV. 130 Tl two lots were allowed to . weio·ht as 100 to 45. 1were In o d . ·s were pe 1a nt ed on the opp-osite sides o·erminate on sand, an pau ly two-thirds grown they were o t '~hen near of four po s. . the following table :- measured, as shown In TABLE XLIV. D el phiniurn consolida. . - No. of Pot. Crossed Plants. Self-fertilised Plants . - - 1- Inches. Inches. 11 I. 11 - -I-II. 19 lG ~ 16a 11a -- - -- III. 26 22 - .- - IV. 9s 8§ 8 6~ - -- Total in inches. 89•75 75·50 14·05 and the SIX self- The six cross~d plan~s hc:e a~e~:g:s 100 ~~ 84. When fully fertiUsed 12.50 Inche.s In he~g~td but from want of time only a grown they were again measure , d . so that I have thought "ingle plant on eac h SI· a e was measure t, At the later pen·o d . h 1· er measuremen s. · It best to give t e ear I t ·n exceeded considerably m the three tallest cro. sed plants. ~ I but not in quite so great 1 . ht the three tallest self-fertlhsed, . d in the green· 1e1g h t were left uncovcre f a degree as before. T e po s . t crossed by boos or sel - house, but whether the flowers w~re In e~d lants produced 282 fertilised I do not know. The SIX c~~~\ t~e six self-fertilised mature and immature capsules, ~ ti \G So that the crossed plants produced only 159; or as J-0 t·:e than tho self-fertilised. plants were very much more pro uc I XI CARYOPHYLLACElE.-VrscARIA ocu LATA . . . · h Hen from ano thor p. lant,· Twelve flowers were crossed ':I~ po wei ·ht 5. 77 grams of and yielded ten capsules, contmnm?. by it~ their own pollen eds Eighteen flowers were fertilised w . ht 2 se . . 63 e:rains. t . . o- by wmg ..., f and yielded twelve capsules, con mnmo ber of crossed and sol ·- r_fhercfore the seeds from an equal num CHAP. IV. VISCARIA OCULATA. 131 fertilised flowers would have been in weight as 100 to 38. I had previously selected a medium-sized capsule from each lot, and counted the seeds in both; the crossed one contained 284, and the self-fertilised one 126 seeds; or as 100 to 44. 11hese seeds were sown on opposite sides of three pots, and several seedling · raised; but· only the tallest flower-stem of one IJlant on each side was measured. The three on the crossed side a\eraged 3.2 · 5 inches, and the three on the self-f~rtilised side 34 inches in height; or as 100 to 104. But this trial was on much too small a scale to be trusted; the plants also grew Ro unequally that one of the three flower-stems on the crossed plants was very nearly twice as tall as that on one of the others; and one of the three flower-stems on the self-fertilised plants exceeded in an equal degree one of the others. .In the following year the experiment was repeated on a larger scale: ten flowers were crossed on a new set of plants and yielded ten capsules containing by weight 6 ·54 grains of seed. Eighteen spontaneously self-fertilised capsules were gathered, of which two contained no seed; the other sixteen contained by weight 6 · 07 grains of seed. Therefore the weight of seed from an equal number of crossed and . pontaneously self-fertilised flowers (instead of artificially fertili ed as in the previous case) was as 100 to 58. The seeds after germinating on sand were planted in pairs on the opposite sides of four pots, with all the remaining seeds sown crbwded in the opposite sides of a fifth pot; in this latter }:lot only the tallest plant on each side was mea ured. Until the seedlings had grown about 5 inches in height no differencu could be perceived in the two lot . Both lots flowered at nearly the same time. vVhen they had almost done flowering, the tallest flower-stem on each 1lant was measured, as shown in the following table (XLV.). The fifteen cro sed plants here average 04 · 5, and the fifteen self-fertilised 33 ·55 inches in height; or as 100 to 97. So that the excess of height of the cro ed plants is quite insignificant. In productiveness, however, the difference was much more plainly marked. All the capsules were gathered from both lots of plants (except from the crowded and unproductive ones in Pot V.), and ~t the close of the season the few remaining flowers were added In. The fourteen cro eel plant produced 381, whilst the fourteen self-fertilised plants produced only 293 capsules and flower ; or as 100 to 77. J( 2 |