NOTES ON MIDDLESEX PLANTS. 868 
The foregoing statements may be ae epitomised :— 
(i.) As Stohr has shown, all but mall percentage of Dicoty- 
ledons have chlorophyll in their Suideriis : repel about half of 
them chlorophyll is found on the upper surface 
ri a ) Etiolin is formed in them as in other " shloropheylligse tis 
n a considerable number (34 per cent.) of species with 
piers chlorophyll grains starch can be easily detected therein ; 
whereas in 24 per cent. a small quantity of sta oe is discoverable. 
Only 42 per cent. have absolutely starchless grai 
(iv.) There is no eventuality in the sppeeratios of the starch, as 
DeBary states, for on the one hand the grains can easily 
charged of and recharged with starch, which, on the other hand, is 
absent ae the ares . some types thro ughout life. 
(v.) In any given case it is at patible to s say @ priort from the 
apparent depth of colowting shown by Soros ae beens 
whether starch will or will not be found therein: this se 
support Pringsheim’s eiedcary of assimilation 
(vi.) The substance blueing with iodine and showi ing the tannin 
reaction with iron salts may perhaps be not tannin, but closely 
related thereto. 
NOTES ON MIDDLESEX PLANTS. 
By Joun Bensow, F.L.S. 
endic 
Fumaria muralis. Still to be found on hedge-banks about 
Teddinato on and Hampton Wick, but in every instance closely 
surrounded by the builder. 
Teesdalia nudicaulis. Pile esie Park inclosure. 
Viola sylvatica var. Reichenbachiana. Sparingly by the Brent 
near Hanwell. (This oa seems to be rediarvably scarce in 
Rosa spinosissi ma. A group of three or four bushes ina oe 
furzy spot by Hounslow Heath. The authors of the * 
observe that they did not meet with this species in upAaieons, "ba 
Mr. Castle appears to have gathered it somewhere in the neigh- 
bourhood about 1835. Iam unable to identify Rosa villosa in any 
the stations recorded for it. a the A pce collected Bye 
. Lees’ stations about Apperton, Perivale, &c., are tomentosa, 
8 are also Mr. Newbould’s records from the a district. taba 
Hind’s nape prove equally unproductive. 
the Harrow station, I can discern neither spaiege aad aonb 
