(1

Euphorbia amygdaloides

Nov. 16th.

Young plant 5 or 6 inches high — small lateral roots put into C. of ammonia about 6 to 1000 at 4° 45' 15' & examined small lateral roots with perfect tips this morning at 10°. — Exteriorly many cells =18° with brown granular matter exactly as in E. peplus— But there are fewer, rarely more than 2 or 3 in a row & the rows do not alternate — seem scattered indiscriminately— The cells in the endoderm are much more continuous, & are narrow & contain the brown granular matter.— I saw some milk-tubes with fewer hyaline drops & odd-shaped masses, near to vascular bundle — These tubes differ much from those in E. peplus & myrsinites, from being extremely irregular, with bulging projections, as described by De Bary, & in one place formed network, as I believe.—

Placed the specimen in Caustic Potash, & heated it for about 2', & than left it in cold Potash, at 11° 30' & examined it next morning 17' at 8° 10' — The brown granular matter removed almost everywhere except in some of the upper

(2

Eup. amygdaloides

thicker part of these short lateral rootlets — In their upper parts many milk sap vessels with hyaline odd shaped small masses, not acted on by the potash beautifully clear. These tubes wonderfully irregular on walls, with all sorts of projections, & it is odd that some adjoining cells contained some hyaline matter like that in tubes. — I could not see tubes near tips of roots — but higher up much confounded by some parasite having sent its fine roots deep into & along the root of the Euphorbia.

I may say milk tube no developed nearly so well as in primary root, yet a good many.

(Finally I may say a considerable number of milk-tubes in smallest lateral rootlets of mature plant, & a few cells with granular matter after C. of ammonia) (over)

[35v]

Eu. amygdaloides

Nov 18th

I must say that I feel doubtful about the number of milk-tubes for I have since discovered that the roots were attacked by the mycelium of some fungus & I might have mistaken such tubes for the finer milk-tubes.—