29 



sccoiuhiiy ones with reticiilatiuiis in oik- species); tlie dorsal mar- 

 _<rinal, broad or liliform; ititcrnu-diates lilifonn (i;iicl\- obsolete), 

 iisuaih' curved; laterals filiform oi^ hioad, distinct from those of 

 the other carpel or conHiient; a proiViiiieiil oilhearin;^ la}er be- 

 neath the epidermis, occasionally containiiij^- sn^all oil-tubes, 

 usualh' a thick la\er of streii_<flheninn^ cells surroundiuij the seed- 

 cavity. 



"»'.'. Erigenia. C'al\\-leeth obsolete. I'ruil nearly orbicu- 

 lar, iiotchetl at base and ape;-;, ^;labrous, thin between the incurved 

 carpels. Carpel \".ith eipial liiiform libs, \ery thin pericai'p, and 

 streiifjthenino- eells beneath the ribs. Oil-tubes 1 to :5 in the in- 

 tervals, y to 11 on the commissural side (from which extends a 

 prominent corky necK-like projection, mcetin<( its fellow from the 

 other carpel and formin<;^ the thin ;.rea between the cur\ ed car- 

 pels). Seed-face narrov/ly and deeply sulcate. 



ARTIFICIAL KEY TO GENERA. 



I. Fruit prickly or scaly. 



* Fruit prickly along' the ril>s : umbels cotnpoutid : leaves 

 pi una t civ decani pound. 



Stylopodium depif-ssed or wantiiifj Dauci-s, 1 



Stylopodiura conleal C'aicalis, 2 



* * Fruit zvitkout ribs^ prickly or scaly all over. 



Flowers in a globose or oblong head: fiuit with tubenu- 



late scales: leaves mostly coriaceous and pri^-kly EnvNciif^i. 21) 



JMowers in irregularly compounded umbels: fruit covered 

 with hooked piickles: leaves mostly palmate, with 

 toothed or incised lobes SamcitjA, .'!(» 



Fruit covered with liooked prickles: h\iv(>s finely dissect- 

 ed Lrptocailis. ."):! 



II. Fruit not prickly nor scaly. 



* Fruit strouoly jlattened dorsally., xcit/i lateral ribs promi- 

 nently winged. 



Oil-tubes solitary in the inleivals. 

 Stylopodium conical. 



