Observations on some Hybrids between Dro- 

 sera filiformis and D. intermedia. 



By J. MuiRHEAD Macfarlane, D. Sc. 



{WITH FIjATE XII.) 



ACCOMPANIED by a few of my students, an excursion 

 was made, during the third week of June, to the rich 

 botanizing grounds near Atco, N. J. Amongst the 

 pine-barren swamps of that locaHty was an area several acres 

 in extent, that was partially flooded, but clothed with a pro- 

 fuse surface vegetation of swamp or bog plants. These 

 consisted almost entirely of the four species, Eriocaulon septafi- 

 gularc, Droscra intermedia, D. filiformis, and a yellow-flowered 

 Utricularia. 



The later blooms of D. filiformis were still abundant, but 

 the involute flower stalks oi D. intermedia were just unrolling, 

 and as was proved later, these did not bloom fully till the 

 second week of July. Casting one's eye across the swampy 

 mass of vegetation, the clusters of pale pink elongated leaves 

 of D. filiformis contrasted strongly with the short, dense 

 clusters of crimson-pink leaves belonging to D. intermedia. 



After a considerable stretch of the marsh had been exam- 

 ined, my attention was arrested by a rather distant group of 

 plants, somewhat intermediate in height and color between the 

 two common species around. A nearer examination of the 

 eleven plants composing the group, suggested the possibility 

 of their being natural hybrids between the above-named 

 species. They were carefully removed, without injury, to one 

 of the greenhouses in the University Botanic Garden, where 

 they have since been grown and watched. A continued and 

 careful exploration of the swamp failed to reveal the presence 

 of additional plants or plant clusters like those already fou»nd. 



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