[184]

Phaseolus multiflorus

Dec 1' 1878

Jar A. 10° 35' 6 7 Bean with N. of silver 4° 30 no effect

Dec 2d 8° a.m. the extreme tips of 3 for about 1/10 turned to blackened side— The tips were now immersed in water

Dec 3d 8° a.m. same slide — Those with tips then curved have grown out almost horizontally— the 3 with tips not curved seem injured all round.

(some of the 6 turned to card Hooked ie. apex to zenith)

Dec 1

Jar B 6 Beans do 10° 45 4° 30' no effect

Dec 2d. 8° a.m extreme tip of 3 turned to blackened side. (Tips immersed)

3d 8° am. do do— all 6 have grown out sub-horizontally as if geotropism lost — (Used)

1 bent from blackened side & this is one was not hooked

(All but one sub-horizontal —looks as if geotropism recorded in tip) (Cieleski)

I suppose I suppose killed

[184v]

(129C

Ch 3. Mitchella

(used these produced during both seasons.)

(In the long-styled flowers the stigma stand within the projects just above bearded mouth of the corolla, & the anthers are seated some way down the tube. In the short-styled flowers the position of the two sets of stigma & anthers organs are reversed these organs occupy reversed positions. In this latter form the fresh pollen-grains are a little larger and more opake than those of the long-styled form. The results of my experiments are given in the following Table.

[figure]

H We here see that 88 per cent. of the paired flowers of both forms, when they were legitimately fertilised, yielded double berries,

[185]

Phaseolus multiflorus

1878

Dec. 3d 8° 30' a.m. — Radicles long & these had germinated in slightly damped sawdust. Stick of Lunar C. dry & rubbed on blotting paper, I then just touched once & quickly one side of apex of 6 radicles — They were left with radicles pointing to zenith for about 10' & then their tips were immersed in water. & placed on Chimney Piece Temp about 65-66° at 4° 30' (ie 8°) examined; through a lens a slight black mark cd be seen on one side; just perceptible in some cases with naked eyes Far more sensitive to this stimulant than Beans.

Dec 3

(1) 4° 30' P.m slightly curved from blackness at rt right angle: Dec. 4' 8° a.m at right angles much grown S

(2) 4° 30 slightly curved about 45° — 4th 8° a.m much less than 45° L

(3) 4° 30 straight black dot almost on apex dried & touched again one with the nitrate — 4th 8° a.m tip now at angle of 34° from minute black dot & perpendicular— 5° P.m. 4th angle now 54°

Decr 5th

(4) 4° 30 slightly curved — nearly rt angle 4th 8° a.m nearly straight L

(5) 4° 30' slightly curved Hooked larger black dot from Caustic — 4th 8° a.m now only at right angle — L

(6) 4° 30' slightly curved about 45°— 4th 8° very nearly right angles (5th 8 a. m now Hooked)

Dec. 5th 8°a.m. all the others have apices now growing straight down, & as several retain curvature caused by the N. of S they have acquired a very irregular shape.

[185v]

(126

(Ch III Cratoxylon)

(Cratoxylon formosum (Hypericineæ)) Mr Thiselton Dyer has pointed out that this true, an inhabitant of Malacca & Borneo, appears to be heterostyled.* (*Journal of Botany London 1872 p 26). He sent me some dried flowers, & the difference between the two forms is conspicuous. In the long-styled form the stigmas / stand just above the numerous anthers & a little beneath the tips of the petals; the pistils are in length to those of the short-styled as 100 to 40, with their globular stigmas are about twice as thick. or broad. In the short-styled form the stamen anthers tower project high above the pistiles, the stigmas of which diverse which project between the three bundles of stamens, & & the stigmas stand only a little above the tips of the sepals. The stamens in this form are to those of the long-styled as 100 to 86 in length; & therefore they do not differ so much in this respect length as the pistils. My son measured ten pollen-grains from each form, & those form the short-styled were to those of from the short longstyled as 100 to 86 in diameter. This plant is in all respects a well-characterised heterostyled species.)