1919.] NATURAL SCIENCES OF PHILADELPHIA. 273 



Annuals, fibrous-rooted. Pedicels ascending or spreading. Corolla 

 membranous, rose-pink, mostly with darker spots and two yellow 

 lines within throat on the anterior side. 

 Corolla with lobes all spreading, pubescent within at base of 

 posterior lobes, externally more or less pubescent. 

 Seeds dark-brown. Plants tending to blacken in drying. Calyx- 

 tube not decidedly reticulate -venose. {PurpureoB.) 

 Leaves uniform, linear to filiform-linear. 



Inflorescence of elongated normal racemes; pedicels less 

 than 12 mm. long. Seed-coat with dark-brown ridges, 

 between which mostly paler and minutely reticulate. 

 Leaves and calyx-lobes obtuse to acutish. Anther-sacs 

 obtuse to acutish at distal apex. Plant fleshy, 

 bushy-branched below with elongated racemes above. 

 Pedicels 5-12 mm. long. 2. A. spiciflora. 



Leaves and calyx-lobes acute to acuminate. Anther- 

 sacs mucronate to caudate at distal apex. Plants 

 not fleshy, more uniformly branched. Pedicels .5- 

 5 (-8) mm. long. 

 Corolla rose-pink to pink, two yellow lines and almost 

 always darker spots within throat evident. Cap- 

 sule 4-7 mm. long. Plants dull-green or purplish. 

 Stem smooth or minutely scabrellous. Axillary 

 fascicles not or slightly developed, if present 

 shorter than the leaves. Seeds .6-1.5 mm. long. 

 Corolla 20-38 mm. long, deeper rose-pink. 



Axillary fascicles slightly developed. Pedicels 

 3-8 mm. long. Seeds .9-1.5 mm. long; 

 areas between reticulations mostly paler, 

 and intrareticular lines discernible. 

 Stem relatively stiffly branched, sparingly 

 scabrellous. Calyx-lobes triangular- 

 lanceolate to -subulate. Corolla 20-38 

 mm. long. 3. A. purpurea. 



Stem slender, virgately branched, glabrous. 

 Calyx-lobes triangular-subulate to subu- 

 late. Corolla 20-25 mm. long. 



4. A. virgata. 

 Axillary fascicles scarcely or not developed. 



Pedicels 2-3 mm. long. Seeds .9-1 mm. 

 long; areas between reticulations nearly 

 black, and no intrareticular lines discernible. 



5. A. pinetorum. 

 Corolla 15-18 mm. long, paler rose-pink. Flowers 



nearly sessile, on pedicels less than 2 mm. 

 long. 6. A. harperi. 



Stem more or less scabrous. Axillary fascicles usu- 

 ally abundantly developed, mostly equaling the 

 leaves. Seeds .5-. 8 mm. long. 



7. A.fasciculata. 



