BicKNELL : Ferns and flowering plants of Nantucket 13 



Arethusa bulbosa L. 



Frequent or rather common in low grounds, often about the 

 borders of swamps. In full flower June 7. 



w 



Ibidium gracile (Bigel.) House. 



Scattered plants are rather common in dry open places, some- 

 times growing in pure sand, occasionally with /. Beckiu First 

 flowers Aug. 11, 1906, blooming through September. In August 

 when /. Beckii is hi full flower, this species, which has a rather 

 later flowering-period, appears to be much the less common, or 

 even rare, but in September when in full bloom, it seems to be 

 equally common with /, Beckii or even somewhat more so. 



* 



Ibidium Beckii (Lindl.) House. 



Common throughout in sandy open places, often in pure sand, 

 usually single plants or a few together. In full flower early in 

 August, continuing in bloom at least until after the middle of 

 September-! 



Ibidium cernuum (L.) House. 



Common In low grounds, coming into flower late in August. 



Achroanthes unifolia (Michx.) Raf. 



South Pasture, not far from the railroad at about the third 

 mile — a scattered colony of perhaps a dozen plants, in full flower 

 Aug. 6, 1906. Reported from hills west of Sachacha and west 

 of Bloomingdale, 1886. 



Leptorchis Loeselii (L.) MacM. 



Reported, like the preceding, on the authority of Mr. Dame, 

 from wet bank on the shore of Sachacha, 1886. *I met with it 

 only at Watt's Run, where two plants were found growing in 

 deep, wet sphagnum Sept. 17, 1907. One of these plants was of 

 unusual size, bearing a closely fruited raceme of thirteen capsules ; 

 the plant was 26 cm. high, its larger leaf 24 cm. long, the larger 

 capsules r.5 cm. high. 



SALICACEAE 



POPULUS ALBA L. 



4 



Spontaneous and spreading in the neighborhood of the town 

 and elsewhere ; on the bluff* at 'Sconset ; many sprouts and groups 

 of young trees about a long-abandoned farm in Polpis. 



