122 



NORTH AMERICAN FLORA 



[Volume 24 



I. Carnei 



Banner a little broader than the other petals, cuneate or abruptly contracted 

 at the base; spikes oblong. 

 Petals white. 



Stem and long branches decumbent; leaves distant, not clustered, 



shorter than the nodes. 

 Stem and branches erect or ascending; leaves more numerous, usually 

 equaling the nodes, with clustered secondary ones in the axils. 

 Petals rose- or flesh -colored. 

 Banner suborbicular or rounded-ovate, much broader than the other petals, 

 truncate at the base; petals rose-colored or deep-pink; spikes globose. 



II. Candidi 



Spikes globose or nearly so, rather numerous, corymbosely or racemosely ar- 

 ranged, each ending a short almost naked branch; petais elliptic. 

 Spikes oblong or cylindric (rarely some on the branches globose) , solitary at the 

 ends of the stem and of long leafy branches; petals oblong. 

 Bracts short-acuminate, rarely exceeding the calyces or flower-buds. 

 Petals truncate at the base; spikes dense in fruit. 

 Petals acute at the base; spikes loose in fruit. 

 Bracts long-acuminate, much exceeding the calyces or the flower-buds. 

 Calyx-lobes less than half as long as the tube. 

 Calyx-lobes about half as long as the tube. 



III. Prostrati 

 One species. 



IV. Fouiosi 

 Leaflets oblong. 

 Leaflets linear. 



V. Phxeoides 

 Calyx-tube glabrous; leaflets 11-17. 



Stem, leaves, and bracts glabrous or the latter slightly puberulent. 

 Stem, leaves, and bracts more or less long-pilose. 

 Calyx-tube pilose; leaflets 13-37. 



VI. Pilulosi 



Calyx very oblique; leaflets 13-37, very small. 

 Calyx not oblique; lobes subulate; leaflets 11-15. 



VII. Compacti 



Leaflets glabrous or sparingly pubescent, linear-oblong. 



Petals white or yellowish-white; leaflets 5-7, glabrous. 



Petals yellow; leaflets 3-5, sparingly silky. 

 Leaflets obovate to elliptic, desnely silky; corolla yellowish-white. 



VIII. Exiles 



Bracts ovate or lanceolate to cuneate, long-acuminate. 

 Leaflets 15-17, oblong-cuneate; spikes short and thick. 

 Leaflets 3-9; spikes slender. 



Leaflets linear to elliptic, acute or mucronate; plant glabrous or nearly 

 so, 2-4 dm. high. 

 Leaflets 3-5, linear. 

 Leaflets 5-9, elliptic or oblong. 

 Leaflets cuneate-obovate, refuse; plant strigose, 1-2 dm. high. 

 Bracts inverted-reniform, apiculate. 



IX. Villosi 



Stem and leaves sparingly villous; leaves ascending. 

 Stem and leaves densely villous; leaves spreading. 



X. Purpurei 



Calyx villous-pubescent with spreading hairs. 



Leaflets linear, conspicuously glandular-punctate; bracts longer than the 

 calyces and the buds. 

 Stem and leaves villous throughout. 

 Stem and leaves glabrous or slightly pubescent. 

 Bracts with glabrous or merely puberulent tips. 

 Spikes dense; calyx not ribbed. 

 Spikes slender; calyx ribbed. 

 Bracts with pubescent tips. 



Spikes less than 1 cm. thick; leaflets obtuse; tips of the bracts 



not longer than the bodies. 

 Spikes usually more than 1 cm. thick. 



Leaflets acute; tips of the bracts much longer than the 



bodies. 

 Leaflets obtuse; tips of at least the upper bracts much 

 shorter than the bodies. 



1. P. gracilis. 



2. P. albidus. 



3. P. carneus. 



4. P. Feayi. 



5. P. mullijlorus. 



6. P. truncatus. 



7. P. oligopliyllus. 



8. P. Sonorae. 



9. P. candidus. 



10. P. proslralus. 



11. P. foliosus. 



12. P. sabinalis. 



13. P. glanduhsus. 



14. P. phleoides. 



15. P. microphyllus. 



15. P. microphyllus. 



16. P. pilulosus. 



17. P. compactus. 

 IS. P. fiavacens. 

 19. P. obovatus. 



20. P. emarginalus. 



21. P. exilis. 



22. P. confusus. 



23. P. evanescens. 



24. P. obreniformis. 



25. P. griseus. 



26. P. villosus. 



27. P. mollis. 



28. P. purpureas. 



30. P. Porterianus. 



31. P. tenuifolius. 



32. P. Callingeri. 

 29. P. Slandleyanus. 



