68 MONOCOTYLEDONE.E. SAGITTARIA. 
que acuto, lobis basilaribus divaricatis, nune latiore, nunc lobo medio 
obtuso, basilaribus fere rectis, 6-50 mill. lato, 60-200 mill. longo. In 
aqua fluente, scapi et petioli graciles, sinuati, folia oblonga, 80-150 
mill.longa, 10-30 mill. lata, basi rotundata vel emarginata, rarius 
breviter lobata, lobis divergentibus, acutis (S. alpina Willd.); vel 
etiam limbo omnino obliterato, folia translucida, tenuiter membra- 
nacea, usque ad 2 met. longa (S. sagitteefolia A vallisneriifolia Coss. 
et Germ. in Gren. et God. Fl. de France 3, p. 167; Vallisneria bulbosa 
Poiret 1. c. ex Boreau Fl. centre p. 596). In regionibus calidioribus, 
praecipue in China, ubi ad usum cibarium planta sæpe colitur, exem. 
plaria vegetiora oecurrunt, foliis majoribus 210-220 mill. longis, 140- 
150 mill. latis, lobo medio rotundato, breviter acuminato, lobis basi- 
laribus longe acuminatis, acutissimis, scapo ssepe ramoso (S. macro- 
phylla Bunge; S. sinensis Sims ; S. hirundinacea Blume). 
In aquis stagnantibus, fossis, ad ripam fluviorum et lacuum in tem- 
peratis Europæ Asiæque. 1° In Europa : ab Anglia, Hibernia, Suecia, 
. Finlandia, Rossia arctiea, ad Lusitaniam, Hispaniam, Italiam (usque 
ad Romam) et Caucasum ; non reperitur in Italia meridionali, nec in 
Grecia. 2* In Asia : in Siberia ex montibus Altaicis, in Kurdistan 
(Strangways in herb. Kew et Vindob.), Afghanistan (Griffith), Bir- 
mania (Griffith n. 5400 in herb. Kew), India (specimina numerosa 
a pluribus viatoribus, in diversis locis præcipue in montibus 1000- 
6000 ped. altis lecta; Wallich n. 4991 et 4992, foliorum latitudo a à 
ad 80 mill. variat; S. hastata Don), in China (Beechey; prope Canton 
propter radicem edulem culta, Seemann ; in vicinibus Shang-Hai, 
Lebeau Contrib. fl. Chine 2, p. 61; in vicinibus Canton et Pekin, spe- 
cimina varia foliis sive angustis seu amplissimis Wavra in herb. Vin- 
dob.); in regno Siam, Bangkok (Wavra in herb. Vindob.); in insula 
Java (Blume in herb. Mus. Paris. Sag. hirundinacea); in Japonia (herb. 
Vindob.); in Corea, Port Chusan (planta parva gracilis, Wilford in 
herb. Kew); in insula Formose (plantæ parvæ, Oldham n. 640, Wil- 
ford n. 500 in herb. Kew). 
8, oligocarpa; gracilis, folia 10-12 cent. longa, 5-8 mill. lata, limbo 
plus minusve abortivo ad phyllodium reducta; scapus 15-20 cent. 
altus; flores feminei ad unum breviter pedicellatum vel sessilem 
reducti; flores masculi numerosi, pedicellati, pedicellis 20-25 mill. 
longis, petala alba; filamenta antheras fere æquantia, semel late 
alata, stylo brevi (Sag. pygmea Miq.). 
In China (Beechey in herb. Kew) et Japonia (Siebold in herb. 
Monac., Oldham in herb. Kew, Zollinger n. 128 in herb. Francav.). 
