CARROT FAMILY 167 



Seed-face plane; oil-tubes solitary in the intervals. 

 10. Atenia. 

 Plants with taproots or rhizomes. 



Fruit round, with sub-glol)ose carpels and very slender 

 incon-spicuous ribs; leaves pinnate; oil-tubes 

 several. 11. Berul.v. 



Fruit ovate or oblong, with more prominent ribs. 

 Oil-tubes sohtary in the intervals; leaves twice or 

 tlu-ice pinnately compound. 



12. C.VRtTW. 



Oil-tubes several in the intervals; leaves ternately 

 or ternate-pinnately compound or decompound. 



13. LiGUSTICUM. 



Acaulescent plants with yellowish green flowers and simply 

 pinnate leaves; oil- tubes several in the intervals. 



14. LlGUSTICELL.\. 



tt Stylopodium flat or wanting; flowers yellow. 



Leaves simple; oil-tubes wanting or continuotis around the 



seed cavity. 15. Bupleurum. 



Leaves compound, or only the basal ones simple; oil-tubes 

 present and not continuous in the intervals. 

 Caiilescent perennials, with taproots. 



Oil-tubes solitary in the intervals; stylopodium want- 

 ing; root neither deep-seated nor conspicuously 

 tliickened; leaves ternately compound or the 

 basal ones simple, cordate. 16. Zizl\. 

 Oil-tubes several in the intervals; stylopodium flat; 

 root deep-seated and usually decidedly thickened, 

 fusiform. 17. MusiNEOx. 



Acaulescent cespitose perennials, with short branched 

 caudices. 

 Oil-tubes 2 or ,3 in each interval; divisions of the 



leaves filiform. 18. Daucophyllum. 



Oil-tubas soUtary in the intervals; divisions of the 

 leav&s elliptic, ovate, or obovate. 



19. Aletes, 

 ** Ribs aU corky. 



Cespitose perennials with branched caudices: flowers vellow or 

 yellowish. 

 Fruit not tubercled; dwarf acaulescent plants. 

 ^ 20. Oreoxis. 



Friut tubercled: stem about 3 dm. high, few-leaved. 



.,^^ 21. H.VRBOURIA. 



Not cespitose perennials, with short rootstocks and fibrous roots; 

 flowers wliite; tall plants. 

 Ribs equal and prominent. 22. SlUM. 



Ribs unequal ; the dorsal ones very low and broad ; the lateral 

 o ones prominent and thick. 23. Cicuta. 



H- Ribs conspicuously winged. 



Plant pseudo-scapose* from a deep-seated fleshy root; leaves fleshy 

 with obtuse segments. 

 Seed-face deeply grooved. 24. Aulospermum. 



Seed-face shallowly concave. 25. Phellopterus 



Plant from a cespitose caudex or rootstock. 



Seed-face deeply grooved; segments of the leaves ovate or lanceolate. 



„ . . , 26. CORIOPHYLLUS. 



Seed-face broadly and shallowly concave; leaves with oblong, sub- 

 ulate or Unear-flUform divisions. 

 Ribs broadly winged; main divisions of the leaves ternate; 

 stylopodium wanting; flowers yellow, except in one species. 

 _,., 27. Pteryxia. 



Kibs narrow; leaves bipinnate; stylopodium present but flat; 

 o i:^ : a . flowers white. 28. PsEUDOREOXis. 



2. b ruit flattened strongly dorsally, with the lateral ribs more or less prom- 

 mently wmged. 

 ^- Stylopodium wanting. 



Dorsal and intermediate ribs or some of them winged. 



Wings tliickened and corky towards the margin; plants pseudo- 

 scapose from a thick deep-seated root. 

 ,^. , 29. Cymopterus. 



Wmgs not tluckened towards the margin. 



Leafy-stemmed plants with a taproot; calyx-teeth small and 

 equal; leaf-segments thin, not pungent. 



, , 30. P.SEUDOCYMOPTERUS. 



Acaulescent plants with a cespitose caudex; caljx-teeth large 

 and unequal, one or two much larger than the rest; leaf- 



•u''^^™'^'^'^^ ''^'^^^'^'^P^™^^^''- 31. PSEUDOPTERYXIA. 



Dorsal ribs filiform (or in one species of Cogsuellia somewhat margined) . 

 Lateral wings tliin, not corky; plants mostly small. 



32. COGSWELLL\. 



* stem mostly subterranean, but rising somewhat above ground and bearing at the end 

 a cluster of leaves and pedimcles. 



