16 UMBELLIFEIIS:. 



Hab. Eelimg, Tailioka. 



Near Z. mysarcnsis Abn'., but distmgnisbable fix)in it in tbe nmcb smalkr 

 leaves and friiits. 



Umbelliferae. 



CaucaUa Linx. 



Caucalis scabra Makixo in TokyO Bot. Mag. (1893) p. 44, (1895) p. 

 230; Tabe Rev. Umb. Jap. p. 27. 



Tonli8 8cabra DC. ; MiQ. Prol. FL Jap. p. 252. 



Hab. Ucbitaroko, Aprili. 1917, leg. B. Hayata et S. S.\saki. 



Sium LiNX. 



Sium foniiosanum H\yata sp. nov. (Fig. 9). Herba robusta. Canlis 

 lOOcm. longus erectus 1-1 ^cm. in diametro sectiouis. Folia altema jnnnat» 

 berbaoea, pinnis oppositis 5-9 sessilibus lanceolatis 4-7 cm. longis 1-2 cm. latis 

 apice acuminatis basi obtusis mai^ine argute serrulatis glabris, petiolis 10 cm. 

 longis basi dilatis caulem amplectantibus. Umbella j^edunculata 6 cm. in dia- 

 metro, bracteis linearibus 1 cm. longis, radiis circ. 15 rectis 2-3 cm. longis apic« 

 umbelluliferis ; umbellula 5-6 mm. in diametro, radiis 10-15 rectis 3-4 mm. 

 longis glabris, bracteolis lanceolatis 3 mm. longis ^ mm. latis acuminatis inter- 

 mixtis. Flores : ovarium glabrum ; caljds k)bis 5 lanoeolatis ^ mm. longis ^ 

 mm. latis acuminatis ; petalis 5 oblongis concavis apice emai^inatis | mm. 

 latis oomibus interiore recurvis ; staminibus 5 glabris, antheris oblongo-oordatis 

 I mm. longis apioe brevissime apculatis ; discis pulviniformibus margine 

 undulatis ; stylis 2 minutis. Fructus rotundatus latere oompressus 2 mm 

 longus totiusque latus glaber. Carpella semi-ovoidea 2 mm. longa 1| mm. lata, 

 jugis 5 sequaliter prominentibus, ad commisSuram plana ; vittae ad vaUeculam 

 solitariae. 



Hab. Atamu, leg. G. Nakahara, Aug. 1905, (typus!); Taichu, Inrin. 



Near Sium nipponicum Maxim.; but distinguishable from it in the fruits 

 with much more prominent ridges, and in the much more minutely eerrulate 

 leaflets. 



