1919.] NATURAL SCIENCES OF PHILADELPHIA. 275 



Corolla mostly 17-25 mm. long. Capsule 

 3-4 mm. long. Seeds .5-.6 mm. long. 

 Leaves sparingly scabrous to glabrous 

 above. 

 Leaves narrowly linear to filiform, .3-1.5 mm. 

 wide. Racemes mostly somewhat de- 

 veloped, so flowers not conspicuously 

 "terminal." Pedicels 15-40 mm. long. 

 ::• Calyx-lobes .2-.5 mm. long. Corolla 18- 



25 mm. long. Seeds rounded, turgid, 

 with reticulations very fine, relatively 

 close. 12. A. holmiana. 



Leaves filiform-setaceous, .1-.3 mm. wide. 

 Racemes scarcely developed, so flowers 

 conspicuously "terminal." Pedicels 15- 

 20 mm. long. Calyx-lobes .1-.3 mm. 

 long. Corolla 17-20 mm. long. Seeds 

 angled, with reticulations less fine and 

 more remote. 



13. A. stenophylla. 

 Pedicels 5-10 (-15) mm. long, shorter than or 

 equaling the bracts. Calyx-tube f-| the 

 length of the capsule. Corolla mostly 25- 

 30 mm. long. Capsule 4-5 mm. long. 

 Seeds .6-.8 mm. long. Leaves slightly 

 scabrous above. Flowers conspicuously 

 "terminal." 14. A. setacea. 



Leaves .5-1.2 cm. long, shorter than the inter- 

 nodes, scabrous above. Corolla 15-22 mm. 

 long. 

 Stem slightly striate-four-angled, sparingly scab- 

 rellous to glabrous. Leaves filiform, .8-1.2 

 cm. long. Pedicels 4-6 mm. long, about 

 equaling the bracts. Calyx-lobes not be- 

 coming callose. 15. A. keyensis. 

 Stem nearly terete, striate-ridged, minutely 

 hispidulo-roughened on the ridges. Leaves 

 linear-subulate, .5-1 cm. long. Pedicels 

 4-15 mm. long, three to six times the length 

 of the bracts. Calyx-lobes becoming more 

 or less callose. 16. A. oligophylla. 

 Leaves dimorphic, those near the base of the stem oval ovate, 

 spreading, the cauline minute, scale-like, appressed. 

 Pedicels 1.5-3 mm. long (many flowers appearing to 

 terminate minute axillary branchlets) . Calyx-lobes min- 

 ute, subulate, callose. Corolla 15-20 mm. long. Stem 

 striate-four-angled, ridged, minutely hispidulo-roughened 

 on the ridges, often pubescent at base. 



17. A. aphylla. 



