288 Umbelliferae 



17. FOENICULTJM Adans. FENNEL. 



Erect biennial or perennial glabrous herbs, with pin- 

 nate compound leaves, linear or capillary leaflets, and 

 compound umbels of yellow flowers. Involucre and in- 

 volucels none. Calyx-teeth obsolete. Petals obtuse or 

 slightly retuse at the apex. Stylopodium long, conic. 

 Fruit linear-oblong, glabrous, terete or nearly so. Car- 

 pels half terete, dorsally flattened, prominently ribbed. 

 Oil-tubes solitary in the intervals. Seed-face flat or 

 slightly concave. 



1. F. Foeniculum (L.) Karst. Perennial, branched, 7-20 

 dm. high; leaves very finely dissected into capillary segments; 

 petioles broad, clasping ; umbels large, 9-25-rayed ; rays glaucous, 

 2.5-7.5 cm. long in fruit; pedicels 2-8 mm. long, slender; fruit 

 about 6 mm. long. (F. vulgare Gaertn.) 



In waste places and along streets. Native of Europe. 



18. SPHENOSCIADIUM Gray. 



Nearly simple thick-rooted perennials, with stout 

 stems glabrous up to the tomentose umbel, once or twice 

 pinnate leaves with bladdery dilated petioles, and scari- 

 ous white or purplish flowers sessile on an enlarged 

 receptacle and forming a compact head. Calyx-teeth 

 obsolete. Fruit flattened dorsally, cuneate-obovate, hir- 

 sute. Carpel strongly flattened at base, winged above, 

 the dorsal and intermediate wings narrow, the lateral 

 broader. Stylopodium small and conic or flat in flower. 

 Oil-tubes solitary in the intervals, 2 on the commis- 

 sural side. Seed-face plane. 



1. S. capitellatum Gray. Very stout, 3-14 dm. high; leaves 

 large and glabrous .; the leaflets oblong to linear-lanceolate, 2.5-5 

 cm. long, with rather few laciniate teeth or lobes, more, or less 

 entire below ; umbel equally 4-15-rayed, with globose umbellets 

 of sessile pubescent flowers ; bractlets few, deciduous ; rays 2.5-5 

 cm. long; fruit cuneate-obovate, about 5 mm. long. 



Cienega, Davidson. 



