[91]

Ipomœa leptophylla

Spec. (1) after reversal.— root .55 long— apex .15 in length
(1) (same spec) 18th. 7º 47' a.m pinned to cork ( ) terminal part for length of  .3 inch turned from centre of earth
11º 48 — tip vertically geotropic! in 4.
11º 50' touched dry caustic 2 or 3 time straight tip & reversed
1º I see solid tip curved. (4º. 30' still upturned in opposition to Gravity
10 30' P.m Horizontal
(19th 7. 40' a.m still the whole horizontal— barely a m.m. blackened
20th 7º 40' am tip now arched laterally : planted 1/2 beneath surface seed flat & root obliquely inclined into soil. (1 Big Pin) over

No 2. quite straight & horizontal pinned 18th 7. 53' a.m—(length .32)
  11º 48' vertically geotropic in 4º
11º 50' reversed (& did not touch with caustic) & now pointing to Zenith
12 50 I see petioles are bowed whole length from seed to tip, length
length .45 inch.—
4º. 30' P.m. still much inclined upwards, but not to zenith
10º 30 curiously curled, tip beginning to be geotropic
19th 7º 40 a.m extreme slightly geotropic — petioles arched — I think have lost power of being geotropic
20th 8 am planted 1/2 inch beneath surface seed flat — root inclined. (2 Pins)

12hr. noon 65º F.

[91v]

No (1) April 1. the 2 petioles are now .9 inch buried the whole root must pro travel down— But I do not know how deep buried— I feel sure not nearly a inch—

91b

(2

(3) 18th 8º a.m.— seed young flat radical root had protruded .44 inch & bent at right angles to seed— —pinned longitudinally so that root now horizontal to see how soon bend down & whether bending extends to whole length
11º 50' slightly tip slight geotropic.— touched with caustic & reversed.
4º. 30' horizontal. 10. 30' P.m— tip geotropic
19th. 7º 40' a.m. whole root extreme tip bowed down almost perpendicularly — tip  of 1 only just perceptibly m.m blackened & discoloured !
20th 8º am planted 1/2 inch. — Cots & root horizontal. (I think)

(4) 18th 8º 15' a.m— —root bent rectangularly down— now reversed & pointing to zenith — extreme length .27 inch of which solid apex .1
11º 50'— now directed only about 30º above horizon
(12º 50' now horizontal— so has moved through 90º since 8º 15'—Reversed seed, so as to eliminate any previous effect of geotropism & touched tip with Caustic
4º 30' Horizontal— 10º 30'— whole root geotropic
19th 7º 40' a.m. whole root bowed down perpendicularly — tip for 1 m.m discolored & blackened. —7º 53' a.m reversed seed so that root now perpendicularly to zenith
20th planted 1.2 inch beneath surface (.? stick.)

92

(3

Ipomœa leptophylla

(5) 19th 7º 48' 50' placed quite horizontally — having germinate grown quit straight after being placed perpendicularly in to peat Length of Radicle 14 mm.
8º 30' I think a little bowed down ——(may be trusted)
9. 30 plainly geotropic — radius of 10 mm.
10. 20' —— radius 5. mm— not far from perpendicularly down some of petioles curved
11º 55' apex very nearly perpendicular — solid apex itself curved & slight curvature extends for .13 along the 2 petioles.—
4º 40'— the solid point seem now alone growing down.—
20th 7. 40' a. m— solid tip now 11 mm in length & petioles 11 mm — These are now inclined downwards — are becoming   bent near cotyledons, as if for the hooking of it
21st 7º 40' a.m— There is a strong arch. formed in the 2 petioles close up to the still crumpled cotyledons, & in consequence of this ( the Cots. being pinned to cork) the whole radicle & petiole has bowed itself by Sachs curvature — which is due to hyponasty or epinasty, also perhaps probably of to apogeotropism of upper part of the 2 petioles
21 5º 30' Pm. Hypocotys now parallel to Cots. owing to arching of top of petioles.