184 PENNELL: PLANTS OF SOUTHERN UNITED STATES 
most obvious of which is the white corolla of the southern plant. 
Southern botanical authors treating of the Carolina flora, describe 
the blue-flowered species, but Chapman, working on the Gulf coast, 
knew only the white-blooming low-growing plant. A brief con- 
trast of the two would be: 
Plant 3-5 dm. tall. Corolla deep-blue within. Stamens and 
pistil about equaling the tube of the corolla. Stigmas spread- 
ing, 3-4 mm. long. Sandy pine-lands, New Jersey to South 
Carolina. 1. D. Porphyrio. 
Plant 1-2.5 dm. tall. Corolla white within. Stamens and pistil 
only about one half the length of the corolla-tube. Stigmas 
slightly spreading, about 1 mm. long. Low pine barrens, 
West Florida. 2. D. tenutfolia. 
Beside the type nearly all the specimens of D. tenutfolia seen 
are from the Chapman Herbarium, and his No. 467b, collected 
November 2, 1884, and distributed by the Biltmore Herbarium, 
may be cited. The only specimens of recent collecting which have 
come to my notice were obtained by Dr. G. C. Fisher at Red Bay, 
Walter County, Florida, in January, 1917. The same observer 
has found thé plant at Sanborn in Wakulla County. These defi- 
nite localities enable us to predict the occurrence of the species 
throughout the low moist pine-lands between Apalachee Bay and 
Escambia Bay. . 
Acerates hirtella Pennell, sp. nov. 
? Oligoron longifolium hirsutum Raf. New Fl. Am. 4:60. 1838. 
No locality given, but description of pedicels as long-hirsute 
suggests, though it over-emphasizes, a feature of the plant 
here considered. | 
Stem 6-10 dm. tall, stout, strongly puberulent in lines above. 
Leaves scattered, numerous, rather crowded, lanceolate-linear, 
9-17 cm. long, 0.6-1.4 cm. wide, scabro-puberulent above and on — 
the veins beneath. Peduncles stout, less than 3 cm. long, scabro- 
hirtellous.. Umbels four to twelve, twenty-five to one hundred. 
flowered. Pedicels 12-15 mm. long, hirtellous with spreading 
hairs. Flowers 8-8.5 mm. long.. Sepals 2 mm. long, lanceolate- 
acuminate, hirtellous on the back. Petals 5 mm. long, lanceolate, — 
greenish yellow, sometimes slightly purple-tinged on back toward 
apex, crenulate at apex. Column 0.5-0.7 mm. long. 
entire, rounded, one half to two thirds the length of the anthers. — 
Anthers acute, each with two wings which are angled above the — 
