•>n Umbelliferae 



incisely toothed or lobed, decurrent on the rachis, and forming a 

 toothed wing ; teeth acute or slightly pointed; umbel with 3-4 

 elongated rays; involucre of leaf-like bracts; involucels of small 

 narrow acute bractlets ; flowers purple, in dense heads, the sterile 

 ones pedicelled ; fruit bristly all over, 3 mm. long; seed-face 

 broadly concave with a prominent central longitudinal ridge. 

 Occasional on grassy hillsides. 



6. S. bipinnata H. & A. Slender, 2—4 dm. high, from a slender 

 fusiform root; leaves twice or thrice pinnate, with divisions not 

 at all decurrent on the rachis, cuneate-oblong to ovate, incisely 

 and mucronately toothed; umbel 3-4-rayed ; involucre of leaf- 

 like bracts; involucels of a few small bractlets more or less 

 united; flowers yellow; fruit 3 mm. long, with strong tubercles 

 tipped with short hooked bristles; seed-face deeply sulcate, some- 

 times inclosing a central cavity, with a central longitudinal 

 ridge. 



Los Angeles River, San Fernando Valley; Oak Knoll, Pasadena 



7. S. tuberosa Torr. Stems 1-6 dm. high from a small globose 

 tuber; leaves twice or thrice pinnate, usually very finely divided, 

 ultimate segments very small ; umbel 1— 4-rayed ; bracts leaf-like; 

 bractlets unequal, united; flowers yellow, the sterile ones on long 

 pedicels; fruit broader than long, rather strongly flattened later- 

 ally for the genus, 2 mm. long, tuberculate and not at all bristly ; 

 seeds somewhat laterally flattened, with plane face. 



Occasional in open places in the foothills. 



4. ERYNGIUM L. 



Glabrous perennials, with often rigid coriaeeous spi- 

 nosely toothed or divided leaves, and white or blue flowers 

 sessile in dense bracteate heads. The outer 1 tracts form 

 the involucre, the inner bractlets intermixed with the 

 flowers represent the involucels. Sepals prominent, 

 rigid, persistent. Fruitovoid, flattened laterally, covered 

 with hyaline scales or tubercles. Carpels with ribs 

 obsolete. Stylopodium wanting ; styles short or Long, 

 often rigid. Oil-tubes mostly ">, ."> dorsal and 5 commis- 

 sural. Seed-face plane. 



1. E. Parishii C. & R. Stems slender, much branched, erect 

 <>r spreading, 1-1 dm. long; basal leaves simple <>r pinnate, the 



