FIGWORT FAMILY 217 



Leaves undi\'ided, minutely doubly crenate. 1. P. racemosa. 



Leaves pinnately divided into linear dentate divisions. 



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

 cleft in front. 

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

 Corolla purplish or rose: cal>x purple-striate and villous at the base. 



3. P. ctenophora. 

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

 deeply cleft in front. 4. P. lunata. 



Beak short and straight., lip narrower and not meeting the tip of the galea. 



Beak about as long as the width of tlie galea: lip reflexed: primary division.s of 

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

 Corolla yellow or ochroleucous. .5. P. Parrui. 



Corolla purple. ti. P. llallii. 



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

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

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



7 P. Canbiji. 

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

 exceeding the flowers. 8. P. »iifolia. 



Galea not produced into a distinct beak, but often -with two lateial teetli near the a|)ex. 

 Leaves pinnately divided or lobed. 



Leaves divided to the midi'ib or nearly so into narrow, acute, dentate or serrate 



or incised divisions. 



Galea distinctly arcuate; stems 2-15 dm. liigh (except in /'. scopulorum, which 



often is only 1-2 dm. liigh). 



Galea tootliless; plant 4-10 dm. high; lip not reaching the tip of the galea. 



Corolla pale yellow: spike elongate, 6-30 cm. long; bracts lanceolate, 



usually produced and exceeding the flowers. 9. P. bractposa. 

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

 acuminate and about iialf as long as the flowers. 



10. P. montanensis. 

 Galea with two lateral teeth. 



Plant tall, 3-15 dm. high; corolla sordid jeUow, 3-3.5 cm. long: lip 



almost reacliing the tip of the galea. 11. P. Grai/i. 



Plant lower, 1-4 dm. liigh; corolla purple. 2-2.5 cm. long; lip not reach- 

 ing the tip of the galea. 

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

 incised. 12. P. cystopteridifolia. 



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

 merely dentate. 13. P. scopulorum. 



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

 usually tootliless; plant less than 1 dm. liigh. 

 Spike verj dense, densely lanate; lower lip almost equalling the galea. 



14. P. lanata. 

 Spike laxer, sparingly if at all lanate; lower lip of the corolla much shorter 

 than the upper. 

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



with purple. 15. P. Oederi. 



Corolla about 12 mm. long; lower lip of the corolla 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 lip of the corolla much shorter than the upper. 



17. P. canadensis. 

 Stem 3-10 dm. liigh; lower lip of the corolla reaching almost to the tip of 

 the galea. 18. P. lancenlata. 



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



19. P. cenlranthera. 

 Leaves merely crenat«. 20. P. crcnulata. 



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



Corolla-tube e.xserted; teeth of the upper coroUa-lip triangular, 1 mm. long. 



1. R. KyroUae. 

 Corolla-tube included; teeth of the upper lip roimded. 2. R. rigidus. 



27. MELAMPYRUM (Tourn.) L. Cow-Wheat. i. M. lineare. 



Family US. LENTIBULARIACEAE. Bladderwort Family. 



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



leaves. 1. Utricularia. 



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



2. PiNGUICULA. 



1. UTRICULARIA L. Bladderwort. 



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

 spur prominent, elongate-conic, curved. 1. L'. vulgaris. 



