16 UMBELLIFERZ. 
Has. Kelung, Taihoku. 
Near Z. mysorensis ARN., but distinguishable from it in the much smaller 
leaves and fruits. 
Umbelliferee. 
Caucalis Liy. 
Caucalis scabra Marino in Tékyd Bot. Mag. (1893) p. 44, (1895) p. 
230; Yase Rev. Umb. Jap. p. 27. 
Torilis scabra DC.; Mig. Prol. Fl. Jap. p. 252. 
Has. Uchitaroko, Aprili. 1917, leg. B. Hayara et S. Sasaxz. 
Stiwar Linn. 
Sium formosanum Hayara sp. nov. (Fig. 9). Herba robusta. Caulis 
100 cm. longus erectus 1-14 em. in diametro sectionis. Folia alterna pinnata 
herbacea, pinnis oppositis 5-9 sessilibus lanceolatis 4-7 cm. longis 1-2 cm. latis 
apice acuminatis basi obtusis margine argute serrulatis glabris, petiolis 10 cm. 
longis basi dilatis caulem amplectantibus. Umbella pedunculata 6 cm. in dia- 
metro, bracteis linearibus 1 cm. longis, radiis cire. 15 rectis 2-3 em. longis apice 
umbelluliferis ; umbellula 5-6 mm. in diametro, radiis 10-15 rectis 3-4 mm. 
longis glabris, bracteolis lanceolatis 3 mm.longis 4mm. latis acuminatis inter- 
mixtis. Flores: ovarium glabrum; calycis lobis 5 lanceolatis 4mm. longis 4 
mm. latis acuminatis; petalis 5 oblongis concavis apice emarginatis 3 mm. 
latis cornibus interiore recurvis ; staminibus 5 glabris, antheris oblongo-cordatis 
2mm.longis apice brevissime apiculatis; discis pulviniformibus margine 
undulatis; stylis 2 minutis. Fructus rotundatus latere compressus 2mm. 
longus totiusque latus glaber. Carpella semi-ovoidea 2mm. longa 14 mm. lata, 
jugis 5 sequaliter prominentibus, ad commissuram plana; vitte ad valleculam 
solitarise. 
Has. Atamu, leg. G. Nakanara, Aug. 1905, (typus!); Taichi, Inrin. 
Near Sium nipponicum Maxim.; but distinguishable from it in the fruits 
with much more prominent ridges, and in the much more minutely serrulate 
leaflets. 
