FIG WORT FAMILY 217 



Leaves undivided, minutely doubly crenate. 1. P. racemosa. 



Leaves pinnately divided into linear dentate divisions. 



CoroUa-tube not exserted; beak more or less spirally incurved; calyx deeply 

 cleft in front. 

 Corolla white; calyx greenish-striate and glabrous. 2. P. contorta. 

 Corolla purplish or rose; calyx purple-striate and villous at the base. 



3. P. ctenophora. 

 CoroUa-tube distinctly exserted; beak crescent-shaped, arcuate; calyx not 

 deeply cleft in front. 4. P. lunata. 



Beak short and straight; Up narrower and not meeting the tip of the galea. 



Beak about as long as the width of the galea; lip reflexed; primary divisions of 

 the leaves short (8 mm. or less long), not narrowed at the base. 

 CoroUa yeUow or ochroleucous. 5. P. Purryi. 



CoroUa purple. 6. P. Hallii. 



Beak much shorter than the width of the galea; Up ascending; lower primary 

 divisions of the. leaves 8-30 nun. long, usually narrowed at the base. 

 Plant 1-2 dm. high; bracts ovate, aU shorter than the flowers. 



7. P. Canbyi. 

 Plant 3-6 dm. high; bracts Unear, oblong, or lanceolate, the lower equalling or 

 exceeding the flowers. 8. P. siifolia. 



Galea not produced into a distinct beak, but often with two lateral teeth near the apex. 

 Leaves pinnately divided or lobed. 



Leaves divided to the midrib or nearly so into narrow, acute, dentate or serrate 



or incised divisions. 



Galea distinctly arcuate; stems 2-15 dm. high (except in J", scopulorum, which 



often is only 1-2 dm. high). 



Galea toothlass; plant 4-10 dm. high; lip not reacliing the tip of the galea. 



CoroUa pale yeUow; spike elongate, 6-30 cm. long; bracts lanceolate, 



asuaUy produced and excee^ng the flowers. 9. P. bracteosa. 

 CoroUa tinged with purple; spike 3-10 cm. long; bracts ovate, short- 

 acuminate and about half as long as the flowers. 



10. P. montanensis. 

 Galea with two lateral teeth. 



Plant tall, 3-15 dm. high; coroUa sordid yellow, 3-3.5 cm. long; lip 



almost reaching the tip of the galea. 1 1 ., P. Grayi. 



Plant lower, 1—4 dm. high; corolla purple, 2-2.5 cm. long; Up not reach- 

 ing the tip of the galea. 

 Leaves divided to the midrib, i. e., rachis not winged; divisions 

 incised. 12. P. cystopteridifulia. 



Leaves not quite divided to the midrib, i. c, rachis winged; divisions 

 merely dentate. 13. P. scopulorum. 



Galea scarcely arcuate, nearly straight, except the hood-Uke rounded apex, 

 usually toothless; plant less than 1 dm. high. 

 Spike very dense, densely lanate; lower Up almost equaUing the galea. 



14. P. lanata. 

 Spike laxer, sparingly if at aU lanate; lower lip of the coroUa much shorter 

 than the upper. 

 Corolla 18-22 mm. long; lower Up 5 mm. long; galea merely tinged 



with purple. . 15. P. Oederi. 



CoroUa about 12 mm. long; lower Up of the coroUa about 3 mm. long; 

 upper portion of the galea dark purple or crimson. 



16. R. flammea. 

 Leaves pinnately lobed two-thirds to the midrib or less, with broadly oblong or 



rounded, obtuse and crenate lobes. 

 Plants caulescent; stamens merely acute. 



Stem 1—3 dm. high; lower Up of the coroUa much shorter than the upper. 



17. P. canadensis. 

 Stem 3-10 dm. high; lower Up of the coroUa reaching almost to the tip of 



the galea. 18. P. lanceolata. 



Plants almost acaulescent; stamens aristate-acuminate at the base. 



19. P. ceniranihera. 

 Leaves merely crenate. 20. P. crenulata. 



26. RHINANTHUS L. Rattle-box, Yellow Rattle. 

 CoroUa-tube exserted; teeth of the upper coroUa-Up triangular, 1 mm. long. 



1. R. Kyrollae. 

 CoroUa-tube included; teeth of the upper Up rounded. 2. R. rigidus. 



27. MELAMPYRUM (ToUrn.) L, Cow- Wheat. l. M. lineare. 



Family 118. LENTIBULARIACEAE. Bladderwort Family. 



Calyx of 2 sepals; coroUa-tube closed by a palate; plants submerged, with dissected 



leaves. 1. Uteicul.4ria. 



Calyx of 5 sepals; corolla with an open throat; plants aerial, with basal entire leaves. 



2. pinguicula. 



1. UTRICULARIA L. Blabdehwort. 



Leaves 2-3 times pinnately divided, with long divisions; corolla about 12 mm. broad; 

 spur prominent, elongate-conic, curved, " 1. U. vulgaris. 



