1

Oxalis corniculatus

On Oct 18th a seedlings marked ie. cotyledons first opened on Oct 17th were examined Cotyledons 2.3 mm in length

On first looking at the upper surface of the petiole as a transparent object I thought there was no distinct zone of smaller cells, but on examining carefully and measuring them it was evident there was a region of smaller cells.

value of one division =. 003mm ⸮

The at average length of the seven 7 epidermis cells which form this region is 6º (HK viii); the next biggest cell of the petiole below this region is 14 13 in length, the biggest above it is 20 15º— The small cells have evidently just been formed from bigger epidermis cells by transverse division, & are of the same breadth as the other cells of the petiole ie 9º-11º — On the other same cotyledon in measuring another row I found the region of small cells consists of only 4 cells in length whose average length is 9 7º; here the biggest bel cell below is 14 in length the biggest above is 25 20º

In another cotyledon the region is made up of 4 cells averaging 9º in length, biggest below 12 above 25

On the whole it may be put so : as on following page taking the averages as well as I can

(2

Lotus c.

Oxalis corniculatus

The average length of the cells forming the region of cells which are smaller than those on either side is 7º 6º?

(1 day old) Cot 2.3 m. in [length] The length of biggest cells below this region is 13º

above is 20º

Specimen observed nutating round a small spot & described briefly by CD, born 16th & observe examined Oct 21. The pulvinus is an obvious band of small cells. Cotyledon 3.1 mm long

(5 days old) Average length of pulvinus cells. 6º Biggest cell below 22º Biggest above 40º

Specimen born 16th examined 29th; has one perfect & fully expand, though minute leaf & the cotyledon is 4.5 mm long

(13 days old) Average of pulvinus 7º Biggest below 30 Biggest above 60º

The cells of pulvinus are about the same breadth as the other cells ie about 10-15 Specimen born 21st examined 29th; one perfect leaf tho' not yet expanded. Cotyledons 5 mm long it is evident that length of Cotyledons variable

(8 days old) Average of pulvinus. 9º Biggest below 44º biggest above 70º

The cells of pulvinus are about the same at breadth as other cells ie 10-15