(6

Drosophyllum —Roots

become at 12° 45 spherical but C. was at first oval & at 1° 45' they touched & pressed each other. (N.B the 2 marked A Z & X after uniting were at first somewhat dumb-bell shaped. — D slightly altered shape. — After 7° 15' at 8° P.m no sensible change in shape

Nov. 27th 8° a. m Looked at these 2 rootlets again — no spheres or aggregation except close to cut ends — little difference in browness of rows of cells — however I cd see root-hairs arise from the paler rows.

(Now examined rootlets which had been kept from 10° 40' on the 26th to 8° 30 27th 22° in sol. of 4 to 1000, & in this rootlet there was magnificent aggregation in the shape of brownish spheres, generally several in numerous rows of cells, from near cut-off end to tip. The spheres in many places had aggregated into dark brown colour, with sinuous outlines. Often or even generally 2 rows of cells adjoin with spheres & then a transparent row of cells, with occasionally a very few minute spheres.

In some few places 3 or 4 rows of such cells adjoin F. made longitudinal section & here it cd be seen

(5

(Nov. 26th) Drosophyllum — Roots

Living Roots — few cut off ends of 3 leading roots — tips white — covered with innumerable brown Hairs — after looking at fresh roots & no agg. visible irrigated at 10° 27' with C. of A. 7 to 1000. At 10° 40' [-] 27 [=] 13 hyaline granules in many cells. After at 35 at about 11° fine spheres in many cells at cut end of 2 roots — At 11° 15 the fine granules had almost disappeared except at 45' close to tip, & I believe solution too strong. In these roots not far from tip browner & lighter coloured cells alternated & I saw many root-hairs arising from the paler rows of cells — The alternating darker & paler rows cd not be distinguished after some time high up the root

From 11° 25' after 1° the large rounded masses in one cell was watched all day (, & they certainly, though slowly changed their form & slight their positions) until next morning. Then at A 2 spheres became united — B & C

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Drosophyllum Roots

(& [2 words illeg]) that 2 or 3 layers of cells from outside contained spheres & minute pale ones in the cells up the vascular bundle — no marked increase in endoderm, which was not seen.—)

I looked with different powers to many parts of thin rootlet with different power & it is certain that root-hairs arise from the rows of cells not containing the spheres, or rarely where there was heavy aggregation on both sides, a very few minute spheres.— Some of the colourless rows were narrow as if inserted, & this made me think that these cells had lately been formed, but then this does not agree with so much aggregation just above tip in E. peplus & other cases.

I likewise traced origin of root-hairs in the transparent longitudinal slices.

(8

Drosophyllum root

It is very remarkable that in the loose or almost oval cells forming the root-cap there were brown spheres, well developed —

I have often noticed brown matter in root-cap cells of E. peplus. — This looks like effete matter, but does not agree with quantity above tip, unless indeed these cells are thrown off. —

[8v]

Drosophyllum

[annotated sketch]

26th 7° 15' no further change since 1° 45'

27' 8° 15' a.m no change in form, but several of the balls have approached each other

[98]

[one line taped over]

space; but no such necessity exists with Desmodium, and the reduction of its lateral leaflets seems due to the principle of compensation, in consequence of the great siz  size of the terminal leaflet.

Urania & Centrosoma: the leaflets of U. lagopus & the leaves of a Centrosema from Brazil drop vertically downwards at night. In the latter plant the petiole of one rose at the same time 16 1/2°.