— 202 — 



Л ni dru m, Nock. Ait acacia, Bancr. r g omy rrhis, Endl, 

 Ottoa, H. B. K. Zizia, Koch. Deringa, Adans. A taenia, 

 Hook, et Arn. Taeniopleurum, С et R. Harp er oil a, Rose. 

 Euloplius, Nutt. Si um, L. Ptilimnium, Raf. Cynoscia- 

 dium, D. С Oenanthe, L. Lilaeopsis, Greene. S pli en os- 

 ci adi um, Gray. L ig us tic um, L. Conioselinum, Hoffm. 

 Oxypolis, Raf. Heracleum, L. Rh odosciadium, Wats. 

 D e a n e a, С. et R. M y r r h i d e n d r о n, C. et R. С о u 1 1 e r о p h y- 

 tum, Robins. 



D. 



Physocaulis, Tausch. (= С h a e r о p h y 1 1 u m, auct. fl. amer, 

 sept.) \ Apiastrum, Nutt. Trepocarpus, Nutt. Spermo- 

 lepis, Raf. A m moselin um, Tor. et Gr. 



The largest genera have the following styles: 



С g s w e 1 1 i a, Spr -j- 



(about 70 species). 



Museniopsis, С et R. . . . -|- 



(about 25 species). 

 Prion OS ci adium, Wats. . , . + 



(about 20 species). 



Caucalis microcarpa. 



Primary ribs filiform, each with a pro- 

 minent stereom (group of strengthe- 

 ning cells). 



Secondary ribs winged, Avith hooked 

 prickles, without stereoms. 



Primary lateral ribs are marginal. 



Comissur broad. 



Eurasian Caucalis. 

 Primary ribs broad, each with a de- 

 pressed stereom. 



Secondary ribs thick cylindrical, Avith 

 stecels, each with a great stereom. 



Primary lateraly ribs are ventral. 



Comissur narroAv. 



Caucalis auct. fl. amer, is without doubt not the same as Caucalis 

 auct. fl. euras., it is impossible to put them in one genus, but it is necessary 

 to count them as tAvo independent genera. The unnamed american genus can to 

 be nomined Yabea m. Avith one species, Y. microcarpa (Hook et 

 A r п.). 



1 The rcadar see, that I also refer Chaerophyllum procumbens, 

 Crantz, С h. Teint urieri, Ниок., etc. [See Bush Transact. Acad. St. 

 Louis 1902] — to Physocaulis. V^or the diagnostic characters of Phy- 

 socaulis see С a 1 e s t a n i, 1. с p. 252. В о i s s i e r, Flora orient. II, p. 909. 

 Wohlfarth im Koch's Synopsis 3 d. A. II, p. 1151. К о u y, Flore de 

 France. VII, p. 298, 309. 



