/?. 



CARROT FAMILY 607 



1 Kibs unlike, the dorsal ones filiform; the lateral ones corky and 

 inflexed towards those of the other carpel; commissure with 

 a corky projection wliich comiects the carpels to the gyno- 

 phore, "leaving two air spaces between the carpels, this pro- 

 jection, and the lateral wings; plants with corms. 



8. Orogenia. 

 tt Ribs all nearly alike; commissure not with corky projection. 

 t Stylopodium conic. 



Leafy plant with wliite or pinkish flowers. 



Plants with fascicled tuberous roots and few narrow, 

 mostly entire leaf-segments. 

 Seed-face concave with a longitudinal ridge; oil-tubes 



several in the intervals. 9. Eulophus. 

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



10. Atenia. 

 Plants with taproots or rhizomes. 



Fruit round, with sub-globose carpels and very slender 

 inconspicuous ribs; leaves pinnate; "oil-tubes 

 several. 11. BeruLu\. 



Fruit ovate or oblong, with more prominent ribs. 

 Oil-tubes solitary in the intervals; leaves twice or 

 thrice pinnately compound. 



12. C.ARtTivr. 

 Oil-tubes several in the intervals; leavas ternately 

 or ternate-pinnately compound or decompoimd. 



1,3. LIGUSTICUM. 



Acaulescent plants with yellowish green flowers and simply 

 pinnate leaves; oil-tubes several in the intervals. 



14. LlGUSTICELLA. 



%t Stylopodium flat or wanting; flowers yellow. 



Leaves simple; oil-tubes wanting or continuous aroimd the 



seed cavity. 1.5. BupLEURtTM. 



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

 present and not continiious 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. ZlZL\. 



OU-tubes several in the intervals; stylopodium flat; 



root deep-seated and usually decidedly thickened, 



fu.siform. 17. MusiNEON. 



Acaiilescent cespitose perennials, with short branched 



caudices. 



Oil-tubes 2 or 3 in each Interval: divisions of the 



leaves filiform. 18. D.\ucophylhjm. 



OU-tubes soUtary in the intervals; divisions of the 

 leaves elliptic, ovate, or obovate. 



19. Aletes. 

 ** Ribs all 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. H.VRBOURIA. 



Not cespitose perennials, with short rootstocks and fibrous roots; 

 flowers white; tall plants. 

 Ribs equal and prominent. 22. SiUTVi. 



Ribs unequal; 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. 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 linear-flliform divisions. 

 Ribs broadly winged; main divisions of the leaves ternate; 

 stylopodium wanting; flowers yellow, e.xcept in one species. 



27. Ptertxia. 



Ribs narrow; leaves bipinnate; stylopodiiun present but flat; 

 flowers white. 28. Pseudoreoxis. 



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

 a cluster of leaves and peduncles. 





