CARROT FAMILY 607 



) liibs unlike, the dorsal ones filiform; the lateral ones corky and 

 inflexed towards those of the other carpel; commissure with 

 a corky projection wliich connects 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 Stvlopodiiim conic. 



Leafy plant with white 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. Eitlophus. 

 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. Berula. 



Fruit ovate or oblong, with more prominent ribs. 

 Oil-tubes solitary in the intervals; leaves twice or 

 tlirice pLnnately compound. 



12. C.\RtrM. 



Oil-tubes several in the intervals; leaves ternately 

 or ternate-pinnately compoxmd or decompound. 



13. LiGUSTICUM. 



Acaulescent plants with yellowish green flowers and simply 

 pinnate leaves; oU-tubes several in the intervals. 



14. LIGUSTICELLA. 



tt Stylopodium flat or wanting; flowers yellow. 



Leaves simple; oil-tubes wanting or continuoiis aroimd the 



seed cavity. 1.5. Bupleuritm. 



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 

 tliickened; leaves ternately compoimd or the 

 basal ones simple, cordate. 



16. ZizL\. 

 Oil-tubes several in the intervals; stylopodium flat; 

 root deep-seated and usiially decidedly thickened, 

 fusiform. 17. Musineon. 



Acaulescent cespitose perennials, with short branched 

 c-iud icGs . 

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



leaves filiform. IS. Daucophyllum. 



Oil-tubes solitary 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. 

 Friiit 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. SlUM. 



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

 P ones prominent and tliick. 23. CicUTA. 



H- Ribs conspicuoiKly winged. 



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

 with obtuse segments. 

 Seed-face deeply grooved. 24. Aulospermum. 



Seed-face sliallowly concave. 25. Phellopterus. 



Plant from a cespitose caude.x 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; 

 stylopodiiixn wanting; flowers yellow, except in one species. 



27. Pteryxia. 



Ribs narrow; leaves bipinnate; stylopodium present but flat; 

 flowers white. 28. Pseudoreoxis. 



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

 a cluster of leaves and peduncles. 



