1921] NATURAL SCIENCES OF PHILADELPHIA. 513 ' 



Capsule globose to globose-obovoid. Caljoc-lobes less than the 

 length of the tube. 

 Corolla with lobes all spreading, pubescent within at base of 

 posterior lobes. 

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

 Caljoc-tube not decidedly reticulate-venose. 



III. PURPUREAE. 



Inflorescence of elongated normal racemes; the pedicels less 

 than 12 mm. long. Corolla pubescent within over 

 nearly entire width of basal portions of posterior lobes. 

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

 obtuse to acutish at distal apex. Plant fleshy, bushy- 

 branched below and with elongated racemes above. 

 Pedicels 5-12 mm. long. 3. A. spici flora. 

 Leaves and calyx-lobes acute to acuminate. Anther-cells 

 mucronate to caudate at distal apex. Plants not 

 fleshy, more uniformly branched. Pedicels .5-5 (-8) 

 mm. long. 

 Stem smooth or minutely scabrellous. Axillary fascicles 

 not or scarcely developed, if present shorter than 

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

 Axillary fascicles slightly developed. Pedicels 3-8 

 mm. long. Corolla 20-38 mm. long. Seeds .9-1.5 

 mm, long; areas between reticulations mostly paler 

 and intrareticular lines discernible. 



4. A. purpurea. 



Axillary fascicles scarcely or not developed. Pedicels 

 2-3 mm. long. Corolla 20-25 mm. long. Seeds 

 .9-1 mm. long; areas between reticulations nearly 

 black and no intrareticular lines discernible. 



5. A. pinetorum. 



Stem more or less scabrous. Axillary fascicles abun- 

 dantly developed, mostly equaling the leaves. 

 Seeds .5-.8 mm. long. 6. A.fasciculata. 

 Inflorescence usually of shorter racemes (if elongated, pedicels 

 over 10 mm. long), usually some flowers, by slower or 

 arrested growth of stem-apex appearing nearly terminal ; 

 pedicels 5^0 mm. long. 

 Corolla 20-40 mm. long, pubescent within in narrow line 

 below sinus of posterior lobes. Seeds with intraretic- 

 ular areas broad, nearly hexagonal. Stigma 3-4 nun. 

 long. Chief cauline leaves 2-3.5 cm. long, those of 

 the branches not scale-like. 

 Stem scabrous. Axillary fascicles abundantly develop- 

 ed. Calyx-lobes minute, .1-.6 mm. long. Pedicels 

 25-40 mm. long. 7 . A . pulchella. 



Stem glabrous or nearly so. Axillary fascicles scarcely 



