UMBELLIFER^. 235 



raised or scarcely conspicuous ; lateral at commissure more or less 

 interior or exterior. Secondary ridges sometimes subequal to primary, 

 rarely reticulate ; intrajugal vittse thin or 0. Seed laterally much 

 compressed. — Annual or perennial herbs, erect or with a rhizome 

 radial at the nodes, sometimes low subshrubby ; leaves alternate 

 entire, dentate or crenate, palminerved or palmately dissected, occa- 

 sionally reniform or 3-angular, sometimes peltate or cordate; sti- 

 pules (?) scarious, entire, lacerate or ; flowers in simple or compound 

 umbels, sometimes in few-flowered cymes ; common peduncle some- 

 times bearing 2-pluriverticillate flowers, or (Micropleura) terminated 

 by a fertile flower ; the 2 or few others peripheric pedicellate sterile 

 inserted under germen; bracts of involucres few or 0. (All warm 

 and temp, regions, often aquatic.) — See p. 139. 



74. Trachymene Eudge.' — Flowers ' polygamous ; sepals 3-5, 

 unequal or 0. Petals 5, unequal, entire, concave, highly imbricate. 

 Styles slender, sometimes capitellate at apex; stylopods discoid, flat 

 or cupuKform, sometimes scarcely conspicuous. Fruit much com- 

 pressed contrary to septum ; carpels 2, equal ; one sometimes smaller 

 aborted or naked ; ' carpophore simple. Primary ridges equal filiform, 

 or unequal; the dorsal bordering the mericarps wider or subalate; 

 the lateral concealed in commissure; the intermediate rather prominent 

 curved or branched ; intrajugal vittae thin or 0. Seed laterally com- 

 pressed. — Glabrous, or pilose* or hirsute herbs; leaves dentate or 

 3-nato-dissected ; receptacle of simple umbels concave capituliform ; 

 bracts of involucre linear.' (Australia, N. Caledoma.^)' 



75. Xanthosia Rudge.' — Flowers polygamous; sepals evolute, 

 ovate, lanceolate, at base cordate or peltate, sometimes decurrent- 



1 Trans. Linn. S, c. x. (1811) 300, t. 21 (not » Free ; the cavity of the receptacle having 



'OC), — Spkeng. Umb. 8. — Kooh, Umb. 143. — been 'taken for the adnate base of the bracts. 



DC. Mem. 28 ; Prodr. iv. 72.— Endl. Gen. n, Eeceptacle at earlier age quite as in the Com- 

 4362.— B. H. Gen. 873, n. 3. — H. Bn. Adanaonia, 



xii. 178.— Sue^elia Eeichb. Consp. 144 (1828) ; « Spec, about 13. Hook. Icon. t. 304, 307 (Di- 



lo. Exot. t. 201.— Didiscus DO. Sol. Mag. t. 2875 (fwoas) .— Bbnth. Fl. Austral iii. 347.— Bk. et 



(1828); Prodr. iv. 72.— Endl. Gen. n. 4361.— Gr. Ann. So. Nat. ser. 5, iii. 235 {Didiscus).— 



Lampra'LTsiyL.{es.'DG.).—Dimetopia'DG. Prodr. Lindl. Sot.Beg. 1. 1225. — F. Mtiell. Fragm.ix.. 



iv. 71.— Cesatia Endl. Ann. Wien. Mus. ii. 200. 46 {Didiscus). — ^T\'alp. Ann. v. 59 [Didiscus). 



—Pritzelia Walp. Rep. i. i28.—Hemiearpm F. 7 Trans. Zinn. Soe. x. 301, t. 22.— DC. Mgm. 



MuELL. Rook. Kew Journ. ix. 18. 31 ; Prodr. iv. 74.— B. H. Gen. 874, n. 5. 



2 White or azure. Leueolcena E. Bg. Flind. Voy. App. ii. 657.— 



' The posterior ; whilst the fertile anterior is Endl. Gen. n. 4364. — Cruciella Lesch. (ex DC). 



oftener covered with hairs or prickles. —Schamofcena Bge. PI. Preiss. i. 289. — Penta- 



* Hair white simple. peltis Bge. loc. cit. 292. 



