(1

Oxalis Valdiviana Circumnutation of Cotyledon

1878

June 18' a seedlings with cot. .17 in length, (& with not very short petioles) was observed under skylight— Hypocotyl not secured [sketch] & Traced on vertical glass. Temp 16 1/2 to 17° C. On this day the seedling was placed too far from vertical glass & tracing too much exaggerated. See tracing; Rose in morning from 8° 15 rose to 9° 10' but not accurately traced from 9° 10' a.m fell to 12° fell greatly so as to be out of sight for tracing.

(Used)

From about 12° to to 1° 37' rose rose; & from this time to about 4° fell fell so greatly as to be again out of sight. At 5° was rose rising & so continued till stood vertical at night. (By 6° 40' a.m. next morning (19th) the cot had fallen so as to stand Horizontally (fell) & continued say at 7° Cot [illeg] to fall till out of sight at 8° 10', & at 8° 35 (rose) began to rise.

June 19th. Pot then moved closer, (apex of leaf being only 1 7/8 of inch from glass) so that tracing not so much magnified: as stated at 8° 35' began to rise (see Tracing) & so continued till 11° & then fell (fell) till 1° 30', after which it rose (rose) till 5°. 45'. It then fell & travelled fell to right; (but this owing to movement of Hypocotyl) & afterwards continued its great nocturnal rose rise till it stood vertical. By next morning (20th) at 6° 35' had fallen greatly & cot. now stood Horizontal

[in margin:] (Temp. on 19th 17 1/2 C.

(2

Oxalis Valdiviana

I have said Hypoctyl not secured & it certainly circumnutate, for when the cot stood vertical a mark was placed behind at 8° 16' P.m on 19th & the movement of the upright glass-filament observed & traced till 10° 40'—

During this time moved great considerably from side to side & somewhat from back to front.— The movement of the Hypocotyl is so small compared with that of the Cot. that it did did not interfere with accuracy of tracing, except late in evening on 19' (see Tracing) when from some unknown cause Hypocty bent greatly to one side & afterwards to opposite side & then recovered usual position.— (Used)

This is cause of odd course fr 3° 30' to 7° 10' P.m on 19th— The circumnutation of Cots of this species, not so complex, as that of Ox. rosea, but has same general character, & yet in the 1 case Cots. rise at night & in other case sink at night.─