CARROT FAMILY 167 



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

 10. Atbnia. 

 Plants with taproots or rhizomes. 



Fruit round, with sub-globose carpels and very slender 

 inconspicuous ribs; leaves pinnate; oil-tubes 

 several. 11. Berula. 



Fruit ovate or oblong, with more prominent ribs. 

 Oil-tubes solitary in the intervals; leaves twice or 

 thrice pinnately compound. 



12. CARITM. 

 Oil-tubes several in the intervals; leaves ternately 



or ternate-pinnately compound or decompound. 



13. LlGUSTICDM. 

 Acaulescent plants with yellowish green flowers and simply 



pinnate leaves; oil-tubes several in the intervals. 



14. LIGUSTICELLA. 

 tt Stylopodium flat or wanting; flowers yellow. 



Leaves simple; oil-tubes wanting or continuous around the 



seed cavity. 15. Bupleiiedm. 



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

 present and not continuous in the intervals. 

 Caulescent perennials, with taproots. 



Oil-tubes solitary in the intervals; stylopodium want- 

 ing; root neither deep-seated nor conspicuously 

 thickened; leaves ternately compound or the 

 basal ones simple, cordate. 16. ZiziA. 

 Oil-tubes several in the intervals; stylopodium flat; 

 root deep-seated and usually decidedly thickened, 

 fusiform. 17. MUSINBON. 



Acaulescent cespitose perennials, with short branched 



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

 leaves flliform. 18. Daucophyllum. 



Oil-tubes solitary in the intervals; divisions of the 

 leaves elliptic, ovate, or obovate. 



19. Aletes. 

 ** Ribs afl corky. „ 



Cespitose perennials with branched caudices; flowers yellow or 

 yellowish. 

 Fruit not tubercled; dwarf acaulescent plants. 



20. Oreoxis. 

 Fruit tubercled; stem about 3 dm. high, few-leaved. 



21. Harbouria. 

 Not cespitose perennials, with short rootstocks and flbrous roots; 



flowers white; tall plants. 

 Ribs equal and prominent. 22. SiUM. 



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

 ones prominent and thick. 23. Cicuta. 



Ribs conspicuously winged. 



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

 with obtuse segments. 

 Seed-face deeply grooved. 24. Auiospermum. 



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. CORIOPHYLLtrs. 

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

 ulate or lluear-flllform divisions. 



Ribs broadly winged; main divisions of the leaves ternate: 

 stylopodium wanting; flowers yellow, except in one species. 



27. Pteryxia. 



Ribs narrow; leaves bipinnate; stylopodium present but flat; 

 flowers white. 28. Pseudoreoxis. 



Fruit flattened strongly dorsally, with the lateral ribs more or less prom- 

 inently winged. 

 "■• Stylopodium wanting. 



Dorsal and Intermediate ribs or some of them winged. 



Wings thickened a.nd corky towards the margin; plants pseudo- 

 scapose from a thick deep-seated root. 



29. Cymopterus. 

 Wings not thickened towards the margin. 



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

 equal; leaf-segments thin, not pungent. 



30. PSEtJDOCYMOPTERtrS. 

 Acaulescent plants with a cespitose caudex; calyx-teeth large 



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

 segments thick and pungent. 31. PSEUDOPTERYXIA. 

 Dorsal ribs flliform (or in one species of CogsweUia somewhat margined) . 

 Lateral wings thin, not corky; plants mostly small. 



32. COGSWELUA. 



ys 



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

 a cluster of leaves and peduncles. 



