248 JVNCACEAE 



FloTvers inserted singly on the racemose branches of the panicle, distinctly separated to some- 

 what crowded but never truly capitate; stems usually slender and rigid; sheaths bladeless 

 except nos. 6 and 10. 

 Flowers many to numerous, in panicles or compound panicles. 



Flowers large (2 lines long or more); perianth segments searious-margined ; capsule 

 oblong-ovate. 



Flowers dark brown ; perianth segments with deep purple margins 3. J. leseurii. 



Flowers mostlj' greenish; perianth segments with whitish margins or only faintly 

 purplish. 

 Sheaths quite bladeless. 



Perianth gi-eenisli or dark, the bractlets scarious; common, widely distributed. 



4. J. Valticus. 



Perianth and bractlets concolorous; S. Cal 5. J. textilis. 



Sheaths bearing scape-like blades 6. J. mexicaniis. 



Flowers small (less than 1 line long) ; perianth segments not searious-margined; capsule 

 obovate or subglobose. 



Stamens 6; capsule liroadly subglobose, obtuse, apiculate 7. J. patens. 



Stamens 3; capsule narrow, clavat^, obovate, obtuse or retuse 8. .7. eff^isus. 



Flowers few (1 to 3); low alpine plants. 



Inner sheaths bristle-tipped; capsule refuse* plants % to I'l. feet high.. 9. J. drummaiidii. 

 Inner shcatlis blade bearing; capsule acute; plants l-j foot high or less 10. J. parnji. 



B. Inflorescence terminal; involucral bract not a continuation of the stem (or if so 

 conspicuously channeled along the upper side). 



1. Low DWAKF .\NNU.\I.S WITH FIBROUS ROOTS. 



Stamens 6; iiowcrs seeund, remote; stems branching from the base; leaves cauline. 



Plants 4 to 10 inches high; capsule oblong 11. J. hufonius. 



Plants 1% to 2 inches high; capsule elliptic 12. J. spluierocarpus. 



Stamens 3 ; flowers in small heads ; stems short with several scape-like peduncles ; leaves mostly 

 basal; plants 1 to 3 inches high; capsule ovate, apiculate 13. J. Irifonnis. 



2. T.\LLER PERENXIALS; ROOTSTOCKS MOSTLY STOUT AND CREEPING. 



a. Leaves not transversely rihbed, u-s-ually fat. 

 Stems naked; flowers solitary in a diffuse (rarely compact) panicle; leaves very fine, with 



ligules 14. J. tenuis. 



Stems more or less leafy ; flowers capitate or clustered ; leaves fiat or grass-like. 

 Stems low, mostly equaling the leaves; ligules none; styles usually short. 



Involucral bract short; heads usually solitary; perianth ecjualing the capsule; segments 



brown-margined 15. J. falcatxts. 



Involucral bract elongated ; heads 3 to (i ; perianth shorter than the capsule ; segments 



broadly white margined 16. J. ohiusatus. 



Stems taller, exceeding the leaves; heads 2 to 6 or many; styles long exserted. 

 Ligules present; leaves narrow. 



Anthers red-bro\vn; lea%"es channeled 17. J. caiiaJiculatiis. 



Anthers white; leaves flat 18. J. longistylis. 



Ligules absent; leaves broad 19. J. latifolius. 



h. Leaves transversely ribbed by inter7xal sep/o. 

 Leaves narrow, terete or sub-terete, not equitant; ligules and septations conspicuous; stems 

 usually slender. 



Early leaves capillary and floating 20. J. s^upiniformis. 



Leaves all erect, not capillary or floating. 

 Heads large (except, no. 22). 

 Perianth dark colored. 



Heads usually few or solitary; perianth segments moderately pliable. 

 Very slender mostly low grass-like plants; heads very dark. 



Heads solitary, wliolly very dark brown; capsule obovate, obtuse; styles 



included; high montane 21. J. mertcn-siamts. 



Heads usually two or more, dark brown with whitish or scarious bractlets at 



base; capsule oblong, acutish; styles exserted 22. J. iievadeiisis. 



Tall plants with less slender stems; heads densely many -flowered ; perianth 



dark brown ; capsule very dark ; coast valleys 23. J. bolanderi. 



Heads numerous in a dense or capitate cluster; perianth segments lanceolate, 



light brown, subspinescent or very rigid 24. J. torreyi. 



Perianth segments pale and scarious, often obtuse 2.5. J. chlorocephal-us. 



Heads small, numerous, in large compound panicles; plants very tall and slender. 



Stems slender, smooth 26. J. duhius. 



Stems stouter, markedly rugulose 27. J. rugidosus. 



Leaves equitant. usually flattened; septations inconspicuous; ligules usually inconspicuous or 

 absent; stems rather stout, ancipital. 



Jepson, Fu)R.\ of California, vol. 1, pp. 193-248, Mardi 17, 1!»22. 



