208 



SCROPHULARIACEAE. 



VOL. Ill 



6. Dasystoma virginica (L.) Britton. Smooth False Foxglove. Fig. 3817. 



Rhinanthus virginicus L. Sp. PI. 603. 1753. 

 Gerardia quercifolia Pursh, Fl. Am. Sept. 423. pi. 19. 



1814. 



D. quercifolia Benth. in DC. Prodr. 10 : 520. 1846. 

 D. virginica Britton, Mem. Torr. Club 5: 295. 1894 



Perennial, glabrous and glaucous; stem strict, 

 rather stout, usually branched, 3-6 high, the 

 branches ascending. Leaves usually all petioled, 

 ovate or ovate-lanceolate in outline, the lower 

 l-2-pinnatifid, 4'-6' long, the upper pinnatifid or 

 deeply incised, the lobes lanceolate or oblong, 

 acute, entire, or dentate ; fruiting pedicels longer 

 than the calyx ; calyx-lobes ovate or ovate-lanceo- 

 late, acute, entire, about equalling the tube; co- 

 rolla ij'-2 r long, glabrous outside, its tube not 

 widely expanded above; capsule glabrous, twice 

 as long as the calyx. 



In dry or moist woods, Maine to Minnesota, south 

 to Florida and Illinois. Golden-oak. July-Sept. 



Dasystoma calycosa Mackenzie & Bush has been 

 distinguished from D. virginica by its more finely 

 divided leaves, its elongate spreading branches and 

 its long and narrow calyx-lobes ; it occurs in Missouri and Arkansas. 



29. AGALINIS Raf. N. Fl. 2: 61. 1836. 



Erect branching annual or perennial herbs, some South American species shrubby, mainly 

 with opposite and sessile leaves. Flowers showy, usually large, purple, violet, yellow, red, or 

 rarely white, racemose, or paniculate, or solitary and axillary. Calyx campanulate, 5-toothed, 

 or 5-lobed. Corolla somewhat irregular, campanulate, or funnelform, the tube broad, short, 

 or elongated, the limb 5-lobed, slightly 2-lipped, the lower lobes exterior in the bud. Stamens 

 4, didynamous, included; filaments more or less pubescent; anthers 2-celled, their sacs obtuse 

 or mucronate at the base, style filiform. Capsule globose or ovoid, loculicidally dehiscent, 

 many-seeded. Seeds numerous, mostly angled. [Greek, remarkable flax.] 



About 45 species, natives of America. Besides the following, some 10 others occur in the 

 southern United States. Most of the species blacken in drying. Type species : Agalinis palustris 

 Raf. (Gerardia purpurea L.) The generic name Gerardia (Plumier) L., used for these plants 

 in our first edition, is typified by Gerardia tuberosa L. (Stenandrim tuberosum (L.) Britton, of 

 the Acanthaceae). 



1. A. linifolia. 



2. A. aspera. 



3. A. heterophylla. 



Pedicels in flower shorter than the calyx, or but 1-2 times as long. 

 Corolla io"-i3" long. 



Calyx-teeth minute ; root perennial. 



Calyx-teeth triangular, lanceolate or oblong, acute ; annuals. 

 Leaves very scabrous, filiform ; capsule oblong. 

 Leaves slightly scabrous, linear ; capsule globose. 

 Calyx-teeth as long as the tube or longer. 

 Calyx-teeth shorter than the tube. 



Stem smooth or nearly so ; branches spreading ; leaves rarely clustered in axils. 



4. A. purpurea. 

 Stem scabrous ; branches virgate ; leaves much clustered in axils. 



5. A. fasciculata. 

 Corolla s"-8" long. 



Calyx-teeth triangular-subulate, acute. 6. A. paupercula. 



Calyx-teeth broad, short, obtuse. 7. A. maritima. 



Pedicels in flower 2-6 times as long as the calyx. 



Leaves flat, linear, spreading or ascending ; capsule globose. 



Leaves %"-i" wide, Y^'-iYz' long; pedicels spreading. 8. A. 



Leaves i"-2" wide, ij4'-3' long; pedicels ascending. 9. 



Leaves subulate, or filiform, the margins often revolute. 



Corolla-lobes obcordate or deeply emarginate. 10. A. parvifolia. 



Corolla-lobes rounded or slightly emarginate. 



Corolla s"-7" long; pedicels erect-ascending. n. A. Skinneriana. 



Corolla 8"-io" long; pedicels spreading-ascending. 

 Calyx-teeth broadly triangular. 



tenuifolia. 

 A. Besseyana. 



A. setacea. 



Calyx-teeth linear-subulate. 



13. A. Gattingeri. 



