[91]

Ipomœa leptophylla

Spec. (1) after reversal.— root .55 long— apex .15 in length
(1) (same spec) 18th. 7° 47' a.m pinned to cork ( ) terminal part for length of  .3 inch turned from centre of earth
11° 48 — tip vertically geotropic! in 4.
11° 50' touched dry caustic 2 or 3 time straight tip & reversed
1° I see solid tip curved. (4°. 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 7° 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)
  11° 48' vertically geotropic in 4°
11° 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.—
4°. 30' P.m. still much inclined upwards, but not to zenith
10° 30 curiously curled, tip beginning to be geotropic
19th 7° 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 65° 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 8° 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
11° 50' slightly tip slight geotropic.— touched with caustic & reversed.
4°. 30' horizontal. 10. 30' P.m— tip geotropic
19th. 7° 40' a.m. whole root extreme tip bowed down almost perpendicularly — tip  of 1 only just perceptibly m.m blackened & discoloured !
20th 8° am planted 1/2 inch. — Cots & root horizontal. (I think)

(4) 18th 8° 15' a.m— —root bent rectangularly down— now reversed & pointing to zenith — extreme length .27 inch of which solid apex .1
11° 50'— now directed only about 30° above horizon
(12° 50' now horizontal— so has moved through 90° since 8° 15'—Reversed seed, so as to eliminate any previous effect of geotropism & touched tip with Caustic
4° 30' Horizontal— 10° 30'— whole root geotropic
19th 7° 40' a.m. whole root bowed down perpendicularly — tip for 1 m.m discolored & blackened. —7° 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 7° 48' 50' placed quite horizontally — having germinate grown quit straight after being placed perpendicularly in to peat Length of Radicle 14 mm.
8° 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
11° 55' apex very nearly perpendicular — solid apex itself curved & slight curvature extends for .13 along the 2 petioles.—
4° 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 7° 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 5° 30' Pm. Hypocotys now parallel to Cots. owing to arching of top of petioles.