60 



NORTH AMERICAN FLORA 



[Voi^UME 22 



25. SEDUM I,. Sp. PL 430. 1753. 



Fleshy mostly glabrous herbs, erect or decumbent, mainly with alternate, often imbri- 

 cated, entire or dentate leaves, and perfect flowers in terminal often 1-sided cymes. Calyx 

 4-5-lobed or 4-5-parted. Petals 4 or 5, distinct or some of them united at the very base. 

 Stamens 8-10, perigynous, the alternate ones usually attached to the petals. Filaments 

 filiform or subulate. Scales of the receptacle entire or emarginate. Carpels 4 or 5, dis- 

 tinct, or united at the very base ; styles usually short ; ovules numerous. Follicles many- 

 seeded or few-seeded. 



Type species, Sedum Telephium L. 



1. Flowers not corymbose. 



A . Leaves densely ifnbricaied, short. 

 Petals yellow. 



Leaves ascending, not closely appressed. 



Leaves ovate ; introduced European species. 

 Leaves ovate-oblong ; Mexican species. 

 Leaves closely appressed. 

 Petals reddish, white or pink. 



Leaves linear-oblong, papillose ; petals reddish. 

 Leaves ovate. 

 Flowers white. 

 Flowers pink or pinkish. 



Carpels spreading ; leaves not fleshy. 



Carpels erect ; leaves fleshy, scarious at the base . 



1. 5. acre. 



2. S. Greggii. 



3. S. muscoideum. 



4. 5. alamosanum . 



5. S. submonianutn 



6. S. cupressoides . 



7. S. moranense. 



8. S. annuum. 



9. ►S. pulchelkim. 



10. 5. vtUosutn. 



11. S. NuUallianum 



12. S. Forreri. 



13. ►S". napiferum. 



B. Leaves not imbricated^ excepting those of rosettes^ alternate or rarely opposite or whorled, 



a. Leaves linear, linear-lanceolate or oblong, terete or nearly so. 



♦Annual or biennial species (or no. 13 perennial). 

 Flowers cymose, the cyme-branches long. 

 Follicles ascending. 

 Plants glabrous. 



Leaves oblong to linear-oblong ; petals bright-yellow. 

 Leaves long-linear ; petals white or pinkish. 

 Plant glandular-pubescent above ; petals red. 

 Follicles widely divergent ; petals yellow. 

 Flowers solitary or in pairs ; petals white or rose. 

 Roots fibrous. 

 Roots napiform. 

 ** Perennial species. 



Flowers white to rose, red or purple. 

 Leaves linear to linear-lanceolate. 

 Rootstock not tuberiferous. 



Petals white, tinged with purple. 

 Herbaceous. 

 Shrubby. 

 Petals red. 

 Rootstock tuberiferous. 

 Flowers white. 

 Flowers purple. 

 Leaves oblong. 



Flowers yellow. 



Leaves linear, alternate, glabrous. 

 Flowers distinctly pedicelled. 

 Flowers sessile or subsessile. 



Calyx-segments manifestly unequal. 

 Calyx-segments all alike or nearly so. 



Plant 7-15 cm. high ; species of western North America. 

 Plant 2-3 dm. high ; introduced European species. 

 Leaves oblong, opposite, softly pubescent. 



14. S. sielliforme. 



15. S. Bourgaei. 



16. 5. calcaratum. 



17. 

 18. 

 19. 



5". guadalaj aranum . 

 S. oxycoccoides , 

 S. diffusum. 



20. 5*. guatemalense . 



21. 5. mexicanum. 



22. 5*. stenopetalum. 



23. ►S. refiexuni. 



24. S. Stahlii. 



b. Leaves oblong to lanceolate or spatulate, more or less flattened. 



* Leaves, at least those of flowering stems, lanceolate to ovate or oblong, mostly broadest at or 

 near the base. 



Annual species, 10 cm. high or less. 



Petals yellow ; follicles widely divergent. 

 Petals white to rose. 

 Roots fibrous. 

 Roots tuberous. 



Plant 5 to 8 cm. high ; calyx-segments 2 mm, long. 

 Plant 2 cm. high or less ; calyx-segments 3 to 3.5 mm. long. 

 Perennial species. 



Leaves oblong, 1 cm. long or less. 



Leaves lanceolate to linear -lanceolate, 6 mm. long or more. 



25. 5. radiatum. 



26. *S*. vinicolor. 



27. 5. Pringlei. 



28. S. minimum. 



29. S. australe. 



