200 



B. dissectum is of very doubtful validity and is probably to be 

 associated with B. obliquiim. B. silaifolium does not seem to 

 develop the dissectum form. Gilbert's var. oneidense is a peculiar 

 form * which seems to belong with B. obliqimni although not 

 typical. 



The western forms are not nearly as well known as the eastern 

 ones. More complete material may modify their grouping con- 

 siderably, either by reducing their number, or possibly even by 

 adding to it. Additional material is greatly to be desired with 

 such notes as habitat, time of fruiting, and altitude. 

 New York Botanical Garden 



SEEDLINGS AND ADVENTITIOUS PLANTS 

 OF DROSERA 



By Robert Greenleaf Leavitt 



In ToRREYA for May, 1909, Miss Winifred Robinson published 

 some interesting notes on bud-derived individuals of Drosera 

 rotiindifolia L.; the extraordinary growths springing from upper 

 leaf surfaces while the leaves were still in organic union with the 

 parent plant, and arising even from a flower stalk which had been 

 broken off. References were also made to the literature of the 

 subject ; Nitschke's description of seedlings of the above species 

 was cited. The conclusion is reached (p. 95) that "in each 

 species except D. binata the first leaves [of adventive plants] 

 resemble those of the adult." It is inferred (p. 89) that seedling 

 foliage of D. rotiindifolia is different from that of adventives. 



Formerly I had for several years various species of Drosera in 

 cultivation, raising seedlings or adventives, and often both, from 

 the following species : D. rotundifolia L., D. capillaris Poir., D. 

 brevifolia Pursh, D. intermedia Hayne, D. linearis Goldie, D. 

 filiformis Rafin., D. filiforniis var. Tracyi McFarl., D. capensis 

 L., D. indie a L. and D. binata Labill. (with D. dicJiotoma Banks 

 & Solander, if this is distinct). I have seedlings of D. uniflora 

 Willd. of Chile. Stages which might be termed adolescent, or 



* Penultimate divisions broad, oblong (narrow and lanceolate in typical ohliqm/??i), 

 the tips broad, usually rounded or blunt, the segments full, the margins plane, more 

 or less finely and irregularly crenulate or bluntly denticulate. (Known from Massa- 

 chusetts to Illinois. ) 



