ALTAMAHA GRIT REGION OF GEORGIA 



73 



i Hymenocallis sp.lf 7 white 



1 Ludwigia alternifolia 6-9 yellow 



1 Carex triceps ?1| 4 — 



1 Scutellaria lateriflora If. 9 blue 



1 Carex squarrosal/. 4 — 



2 [Porella pinna ta] 



1 [Brachelyma robustum] 



Summary. This habitat -group is noteworthy for containing 

 seven vines and. only five evergreens. This is a larger number 

 of the former and a smaller number of the latter than in any 

 previously mentioned group. The scarcity of evergreens makes 

 these swamps look very lifeless in winter. The number of trees 

 is the same as in the group immediately preceding. The herbs 

 are mostly if not all perennials. Broad, thin leaves are the 

 rule here, as in most swamps, principally because of the 

 shade. 1 



The trees without exception flower between February and 

 April, and most of them are wind-pollinated. The number of 

 flowers of all kinds is greatest early in April, though there is a 

 second but smaller maximum about the summer solstice. The 

 average flowering period seems to be about 39 days. 



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



Fig. 9. 

 Phsenological diagram for 49 plants of muddy river-swamps, including 15 trees 

 and 10 shrubs. 



The prevailing mode of dissemination seems to be through the 

 agency of the wind, about 17 species having winged or comose 

 seeds or fruits. Ten species have fleshy fruits. At least nine 

 have fruits adapted to floating on the water, and it is very likely 

 that the fruits of nearly all the species will float away if not taken 

 care of otherwise. Five species of trees have nuts or acorns. 

 The resilient herbaceous stems ("tonoboles"), so common in the 



'For references to anatomical studies of Baccharis, Liquid ambar, and 

 Dendropogon see the catalogue. 



