720 Lxx. UMBELLIFBES!. (C. B. Clarke.) IPsammogeton. 



.and Cabul. — Very unlike the type, but there are intermediate forms. Probably 

 P. brevisettim and seti/oUum, Boiss. Fl. Orient, ii. 1079, are other varieties. 



DOTTBTFUL UMBELI.IFERS, 



SisoN TEiNEETE, Sam. in, Don Prodr. 184 ; DC. Prodr. iv. 111. 

 Athamantha giqantea. Von Prodr. 184 ; DC. Prodr. iv. 156. 

 Athamantha teebs, Don Prodr. 185 ; DC. Prodr. iv. 166. 



LiGVSTicnM ?NEPAiENSE, Don Prodr. 125; DC. Prodr. iv. 159. '{An Hymeno- 

 :ixna.? DC. I. c.j 



Okdeb LXXI. ARAXiXACEH:. (By 0. B. Okrke.) 



Trees or shrubs, very rarely herbs, sometimes scandent or scandent when 

 youBg and finally, self-supporting, not rarely prickly. Leaves alternate, the 

 , uppermost rarely sub-opposite, long-petioled, large, simple or compound ; 

 stipules adnate to the petiole, sometimes inconspicuous or 0. Flowers regular, 

 smaU, sometimes polygamous, in umbels racemes or panicled heads ; bracts 

 and bracteoles small or conspicuous; pedicels continuous with the base of 

 the calyx or there jointed. CcHyx-tuhe adnate to the ovary; limb truncate, 

 obsolete or with small teeth. Petals 5 rarely 6-7 or many, valvate or sub- 

 imbricate, expanding or deciduous in a cap. Stamens as many as and alternate 

 with the petals (very many in Tv/pidanthus), inserted roimd an epigynous disc. 

 Ovary inferior, 2-celled, or cells as many as the stamens (in ArthrophyWam 

 1-celled) ; styles as many as the cells, distinct or united ; ovules solitary and 

 pendulous in each cell. Fruit coriaceous or drupaceous usually small, one or 

 more cells sometimes suppressed. Seed pendulous, albumen uniform or rumi- 

 nated ; embryo minute, radicle next the hilum. — Disiezb. Species 340, chiefly 

 tropical and subtropical, a few in the cool temperate zones. 



Sect. I. Aralieae. Peiofe imbricated (but only lightly). Perficefo jointed. 



Styles 2-5, free. Leaves compound 1. Ahalia, 



Styles 5, combined 2. Fentapahax. ■ 



Styles 4-3, free. Leaves pinnatifid 3. ABALmruM. 



Sect. n. Fanacese. Petals valvate. Albumen uniform. 



* Ovary 2-celled. 



Pedicels jointed. Leaves decompound . 3.*Panax. 



Pedicels continuous. Leaves digitate 4. Acanthopanax. 



** Ovary 4^10-celled. 



+ Umbels sessile on the hack of the leaf. 

 .Leaves simple 5. Helwingia. 



tt Pedicels jointed. 

 Xeaves once pinnate 6. Poltscias. 



ttt Pedicels continuous. Leaves not pinnate. 



Fruit angular the size of a pea 7. Heftapleuetim. 



Fruit more than J in. long 8. Trevesia. 



Tlower sessile embraced by 4 bracteoles 9. Bbassaia. 



Xeaves simple (except the lowermost) 10. Dendeopahax. 



