92 



HARPER 



i Zygadenus glaberrimusl/- 7-8 white 



1 Habenaria blephariglottis X 



ciliaris1| 8 cream 



1 Cyperus Haspanlf. 



1 Marshallia graminifolial/- 



1 Mesosphasrum radiatumlf. 



1 Macranthera fuchsioidesl| 



1 Ludwigia pilosalf. 



1 Apios tuberosa% 



1 (Cuscuta compa;ta)(\) 



1 Sphagnum tenerum (and doubtless other species) 

 1 Batrachospermum vagum keratophytum 



6-8 



7-9 

 6-8 

 9—10 

 6-9 



pale purple 



orange 



dark purple 

 cream 



Summary. The flora of the sand-hill bogs can best be com- 

 pared with that of moist pine-barrens and branch-swamps, al- 

 ready discussed. The woody plants are much more abundant 

 and conspicuous than the herbs (usually growing so densely 

 that these bogs are difficult to penetrate), and about two-thirds 

 of them are evergreen. There are three vines, one quite com- 

 mon, a woody evergreen, and the other two rarer, one a peren- 

 nial herb and the other an annual parasite. Nearly all the 

 herbs are perennial. 1 



Jan. Feb. Mar. April May June July Aug. Sept. Oct. Nov. Dec. 



10 



Fig. 13. 

 Phrenological diagram for 45 plants of sand-hill bogs, including 15 trees and 

 shrubs. 



I know of no flowers in these bogs earlier than March or 

 later than October. Perhaps the flowering season is thus re- 

 stricted by the cold, shaded, water-soaked soil, with its covering 

 of peat. The height of the flowering season seems to be in 

 August, but there is another conspicuous maximum in April. 

 The average flowering period is about 43 days. 



The proportions of various colors of flowers are about the same 



1 For references to anatomical studies of Leucoihce axillaris, Ilex 

 glabra, Magnolia glauca, Myrica Carolinensis, and Smilax laurifolia see the 

 catalogue. 



I -^. _ _,^ _ -/-^y- - --\-T l 1- 



