288 PROCEEDINGS OF THE ACADEMY OF [DeC, 



of the calyx. Capsule ovate, 5-6.5 mm. long. Seeds. Stem less 



pubescent or even glabrate. 



Leaves prevailingly lanceolate-elliptic, mostly obtuse, only the 



uppermost at times linear and then reduced. Corolla-lobes 



usually 4-6 mm. long. 2a. B. elongata obtusa. 



Leaves linear or nearly so, mostly acute to acuminate, only the 



lowermost if any lanceolate-elliptic. Corolla-lobes usually 



6-8 mm, long. 2. B. elongata. 



1. Buchnera americana L. 



Buchnera americana L., 1. c. 630. 1753. "Habitat in Virginia, Canada." 

 Based upon Gron., Fl. Virg. 74. 1743, typified by Clayton 142 from Vir- 

 ginia. Description sufficiently distinctive. 



Sandy or sterile loam soil, throughout the area except in the 

 Appalachians, probably more frequent in the Coastal Plain where 

 it may intergrade with B. elongata obtusa. 



Flowering from June to September, and soon ripening fruit. 

 Corolla purplish-blue throughout. 



Pennell (Alabama)— 4478, 4518, 4550, 4554. 



2. Buchnera elongata Sw. 



Buchnera elongata Sw., Prod. Veg. Ind. Occ. 92. 1788. "India occidentalis, 

 Jamaica"; Fl. Ind. Occ. 1061. 1800, "Habitat in arenosis depressis Indiae 

 occidentalis. Versus jugum montium paroeciae Clarendon Jamaicae." 



Sandy soil, dunes and limestone pineland of southern Florida, 

 passing into var. obtusa. Ranges through the West Indies, and in 

 northern South America. 



Pennell (Florida)— 9541, 9543, 9546, 9547, 9552. 



2a. Buchnera elongata obtusa Pennell, var. nov. 



Buchnera angvstifolia Raf., New Fl. Amer. 2: 32. 1837. "In Alabama." 

 Described as with linear leaves, but these remote. Surely an attenuate 

 state of our variety. 

 (?) Buchnera levicaulis Raf., 1. c. 39. 1837. "Florida." Description of 

 stem as angular and quite smooth suggests that this may belong to some 

 other genus. However, while our plant is characteristically pubescent, 

 it occasionally occurs nearly glabrous. 



Leaves prevailingly lanceolate-elliptic, mostly obtuse, only the 

 uppermost linear and then not elongate. Corolla usually smaller 

 than in the species, its lobes usually 4-6 mm. long. Intergrades 

 with the species in southern Florida and the Bahamas, 



Type, open sandy pineland, 1-2 miles north of Abita Springs, St. 

 Tammany Parish, Louisiana, collected in flower and fruit Aug- 

 ust 14, 1912, F. W. Pennell 4190, in herbarium New York Botanical 

 Garden; isotype in herbarium University of Pennsylvania. 



Sandy pineland, in the Coastal Plain from North Carolina to 

 southern Florida, westward to southeastern Texas. 



Flowering from March to October, and soon ripening fruit; south- 

 ward throughout the year. Corolla purplish-blue throughout; occur- 

 ring also frequently in an albino form. 



