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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 6° (HK viii); the next biggest cell of the petiole below this region is 14 13 in length, the biggest above it is 20 15°— 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 9°-11° — 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 7°; here the biggest bel cell below is 14 in length the biggest above is 25 20°

In another cotyledon the region is made up of 4 cells averaging 9° 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 7° 6°?

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

above is 20°

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. 6° Biggest cell below 22° Biggest above 40°

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 7° Biggest below 30 Biggest above 60°

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. 9° Biggest below 44° biggest above 70°

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