46 HARPER: VEGETATION OF THE Pinus TAEDA BELT 
percentage of it that comes in the four warmest months (June to 
September) and six warmest months (May to October). The 
stations selected are Williamsburg, Va., Goldsboro, N. C., and 
Blackville, S. C., at each of which records have been kept for more 
than twenty years. The figures have been computed from the 
annual summaries of the U. S. Weather Bureau for 1913, except 
that a few obvious typographical errors have been corrected with 
the aid of the 1912 summaries. There happens to be no station 
within the Virginia portion of the Pinus Taeda belt with a suff- 
ciently complete record, but Williamsburg is only a short distance 
away, on the north side of the James River. 
| Mean temperature | Average Precipitation 
Stations and length of record | | 
| Jan. | July Annual Annual 4 mos. | 6 mos. 
Williamsburg, Va., 22 years. | 38.4° | 76. 8° | 57.x° | 49.18 | 38.6% | 51.9% 
Goldsboro, N. C., 44 years.....| 42.3° | 79.8° | 61.1° | §1.85 | 45.0% 60.0% 
Blackville, S. C., 25 years...... | 46.4° | 81.7° | 64.4° | 47.47 | 44.3% 58.3% 
The milder winter southward is of course not surprising. The 
proportion of summer rain is higher here than in most places a 
little farther inland, but lower than in the neighboring Cape Fear 
pine-barrens.* The wetness of the summers in North Carolina, 
especially as compared with Virginia, is significant, and helps 
explain some of the differences in soil and vegetation. 
Vegetation. The prevailing type of upland vegetation in this 
region resembles the typical pine-barrens farther south except in 
having more Pinus Taeda than Pinus palustris, more deciduous 
trees, and more shrubs. The flat areas and shallow depressions 
previously mentioned generally have either pocosin or cypress 
pond vegetation, the former being commonest in North Carolina 
(but more characteristic of the Cape Fear pine-barrens) and the 
latter in South Carolina.t Both alluvial and non-alluvial swamps, 
_* For similar data for other places see Bull. Torrey ce ‘37: 415-416. 1910; 
41: sega see — Fla. Geol. Surv. 6: 182-183. 1914. 
+ The ” described by Chapman and the meee described by Coker, 
jn the wo ics on foiak Carolina vegetation already cited, must be very similar to 
pocosins, while Chapman's “‘ pocosins” and Coker’s “‘ oe i 
ress ponds. This does not necessarily indicate that these authors used the terms 
incorrectly, but rather that local usage varies from place to place. Readers who are 
not familiar with the term “ pocosin” can find references in Bull. Torrey Club 37: 
415 (first footnote). 1910; and New Internat. Encyc. II. 18: 761. 1916. 
