120 1.8.C. Preceedings of the Ninth [N.S., XVIII, 
4. Plant ee have become much more a In addition, 
there have been discovered a few colonies of pure spec 
. Variety in the | fora, and its changing nature oni year to year 
have become very prominent. 
6. The cultivated ae reseede.! middle strip has not stood to advan- 
7. Firmer establishment of good fodder grasses on peorer spots, the 
gradually increasing area of marvel, and the extension of Ischaemum 
laxum on the land are hopeful features. 
he different tests of land improvement applied show favourable 
results, and the experience so far gained gives good hope of success. 
ae 
Field notes on oat gach airs of Southern India.—By 
C. C 
F Seer ore =o been published on the subject 
2. The me economic importance as some of its species 
gore caoain a ste 
Theories as to susceptibility or immunity from attack are reviewed 
a criticised. 
; - The notes refer to 23 specific parasites and 6 varieties and 218 host 
plants 
5. Nc new theory has been suggested but the observations refute all 
the peers seieories as far as known except that of races within the 
species, 
gi foreign weeds recently saironerd in the neighbour- 
hood of By 8. R 
Several ‘phe ort soi etter Seige es in the Panjab plains 
and are well kno , Erigeron ‘linifolium, Malva- 
a ie oe sp.,e prot are. rani es. 
Some others have been noticed during recent years and are described 

1ey reig A 
H ytrocotyl rotundifoli: ia a sith aps | Sita apetala, and Lactuca scariola. 
Am ons ¢ - ie aie cars pes a ing are no cr me Senebiera didy- 
ma, mbosa, Am najus, Tridax procumbens, 
Nicstiana. pipabarin ja Rucllia sebotea. Ve rbena bonariensie Euphor- 
bia geniculata, Eichornia crasspies, and Nothoscardum fragra 
A note on pollination and its economic importance in 
some of the chief crops of the Central Provinces and 
Berar.—By K. P. Surtvastava. 
1, Cotton.—Observations were made on Gossypium neglectum sub- 
vars, malvensis, vera, and rosea; G. indicum var. bani; G@. hirs pe vars. 
rufa and buri. The flowers open between 7 and 10 a.m. Ordinarily self- 
pollination takes place, but insects, chi efly bees and butter flies, effect 
some cross pollination. The percentage of crossing varies with di fferent 
# : 
Bajra rp sane typhoideum) is cross a —— tes 
agency of wind and insects. Protandry prevents self pollin ae 
especially Aphis dorsaia, visit the flowers in great numbers. 
3. Tur (Cajanus indicus).—In wat — ically aa flower, 
the anthers dehisce before the bud opens, and normally eclt- po 
results. But there is evidence that “oss ethos also oce gi 
clear days t the flowers open at abou and begin to fade gd 
the next day. Bees, especially sacle ‘isaimilis and Aphis dor rata, 
