1076 RHINANTHACEAE 



Leaf-blades filiform : stem-leaves without clusters of smaller 



leaves in their axils. 8. G. Plukenetii. 



Leaf-blades linear-spatulate : stem-leaves with conspicuous 



clusters of leaves in their axils. 9. G. Georgiana. 



Capsules 5-7 mm. in diameter : calyx-lobes mostly 1.5-2 mm. 



long. t 10. G. paupercula. 



Blades of stem-leaves subulate. 11. G. microphytta. 



Calyx-lobes blunt : plant succulent. 12. G. maritim'a. 



Pedicel much longer than the calyx and capsule. 



Leaf-blades broadened upward. 13. G. Skinneriana. 



Leaf-blades not broadened upward. 



Leaf-blades mainly filiform or subulate. 



Stem-leaves or most of them furnished with clusters of leaves in their 



axils. 



Leaves mostly alternate. 14. O. flli/olia. 



Leaves mostly opposite. 



Stem-leaves, or most of them, with conspicuous clusters in their 



axils. 15. G. setacea. 



Stem-leaves with inconspicuous clusters in their axils. 



Pedicels longer than the bracts : corollas over 1 cm. long. 16. G. Holmiana. 



Pedicels shorter than the bracts : corollas less than 1 cm. long. 17. G. polyphylla. 

 Stem-leaves, or most of them, without clusters of smaller leaves in their 



axils. 



Bracts surpassing the pedicels. 17. G. polyphylla. 



Bracts shorter than the pedicels. 

 Calyx-lobes less than 1 mm. long. 



Pedicels over twice as long as the bracts. 18. G. diiwicntn. 



Pedicels less than twice as long as the bracts. 19. G. Gattinyrri. 



Calyx-lobes fully 1 mm. long. 



Leaves of the branches filiform, not rigid. 20. G. aspcmla. 



Leaves of the branches subulate, rigid. 21. G. strictijiora. 



Leaf-blades mainly linear, their margins sometimes slightly revolute. 



Calyx-lobes less than 1 mm. long : leaf-blades smooth or nearly so. 22. G. tenutfolia. 



Calyx-lobes fully 1 mm. long : leaf-blades scabrous. 



Corolla rose-purple, fully 1 cm. long. 23. G. BestcwuM, 



Corolla yellowish pink, less than 1 cm long. 24. G. virulis. 



1. Gerardia linifolia Nutt. Stems 5-9 dm. tall, smooth and glabrous, sparingly and 

 virgately branched. Leaf-blades thickish, linear, 1-5 cm. long, rarely over 2 mm. broad, 

 acute : pedicel longer than the calyx, enlarged at the top : calyx-tube 4-5 mm. high, the 

 lobes acute, much less than 1 mm. long: corolla rose-purple, 2-2.5 cm. long: capsules 

 5-7 mm. in diameter. 



In low pine lands, Delaware to Florida. Fall. 



2. Gerardia aphylla Nutt. Stems 2-9 dm. tall, nearly smooth, simple or usually 

 sparingly branched above, 4-angled, nearly naked. Leaves various, those near the base of 

 the stem with oval or oblong leathery blades 5-10 mm. long and fugaceous ; those higher 

 up on the stem and branches reduced to scattered subulate appressed scales : pedicels 

 usually 1-3 mm. long : bracts similar to the upper leaves : calyx-tube campanulate, 2-2.5 

 mm. high, the lobes minute : corolla rose-purple, 1-1.5 cm. long : capsules subglobose, 

 3-3.5 mm. in diameter. 



In low pine lands, North Carolina to Florida and Louisiana. Fall. 



3. Gerardia filicaulis Chapm. Stems 2-5 dm. tall, smooth, glaucescent, usually 

 much branched, apparently leafless. Leaves reduced to minute subulate scales : pedicels 

 5-10 mm. long, club-shaped : calyx-tube campanulate, 2.5 mm. high, the teeth minute, 

 rather triangular : corolla rose-purple, 6-10 mm. long, delicate : capsules about 4 mm. in 

 diameter. 



In low pine lands, Florida to Louisiana. Fall. 



4. Gerardia heterophylla Nutt. Stems 1-6 dm. tall, smooth or nearly so, branch- 

 ing above. Leaf-blades linear or narrowly linear-lanceolate below, 1-5 cm. Jong, rarely 

 4 mm. broad, acute, erect or erect-ascending, somewhat scabrous along the margins : pedi- 

 cel shorter than the calyx, enlarged upward : calyx-tube campanulate, 3-4 mm. high, 

 the lobes lanceolate or subulate-lanceolate, about as long as the tube : corolla rose-purple, 

 about 2 cm. long : capsules 5-6 mm. long. 



On prairies, Arkansas and- the Indian Territory to Texas. Summer and fall. 



5. Gerardia aspera Dougl. Stems 1-6 dm. tall, more or less scabrous, branching 

 above. Leaf -blades linear, mostly less than 1.5 mm. wide, 1-3 cm. long, acute: pedicel 

 mostly as long as the calyx-tube or longer : calyx-tube 5-7 mm. long, turbinate, the lobes 

 deltoid or triangular-lanceolate, about as long as the tube : corolla rose-purple, about 2 

 cm. long : capsules elliptic or ovoid-elliptic, 8-10 mm. long. 



On plains or prairies, Indiana to South Dakota and Arkansas. Summer and fall. 



6. Gerardia fasciculata Ell. Stems 5-12 dm. tall, often puberulent or sparingly 

 hispidulous, branching. Leaves numerous, the larger ones with clusters of smaller ones in 



