Se ant il a ili 
i RN A 
iT 
259 
TRAPA natans. 
European VVater-caltrops. 
— Se 
TETRANDRIA MONOGYNI4. 
Nat. ord. Hyprocuaripes. Jussieu gen. 67. 
Onacrantx. Lamarck et Decand. fi. frang. 4. 413. 
TRAPA. Vid. Append. hujus vol. in loco. 
T. natans, nucibus quadricornibus, spinis patentibus. Lin. suppl. 128. 
Trapa natans. Linn. sp. ig 1.175. Geertn. sem. 1. 127. t. 26. f. 5. Allion. 
pedem. n. 872. Krock. sibes. n. 246. Hort. Kew. 1. 164. ed. 2. 1. 267. 
Lamarck encyc. 3. 669. illustr. t. 75. Villars dauph. 2. 340. Lam. et 
Decand. fl. frang. 4.418. Schkuhr handb. 1. 85. t. 25. Willd. sp. pl. 1. 
681; (excl. Iheede mal.) Prod. flor. gr@c. 1.104. 
Trapa foliis natantibus, petiolis ventricosis. Hall. helv. n. 527. 
Tribulus aquaticus. Cam. epit.715. Bauh. pin. 194. Ger. emac. 84. 
Rhizoma natans, nodis promens radices compositas & radiculis numefosis 
setaceo-capillaribus in axem communem pyramidatim connatis 3 caudex -con- 
Jferte foliosus, foliis super aquam in stellam multiradiatam dispansis, longé 
petiolatis, lamina rhombea superné subrotunda dentatd © dentibus bimu- 
cronatis, diametro sesquiunciali, vividé virentia, infra pubescente; petiolis 
3-plo longioribus lamina, hirsutiusculis, adultis superné extumescentibus in 
utrem oblongum medullé cellulosé repletum cujus ope natat planta. Flores 
plurimi, parvi, submersi; pedunculi breviores petzolis, subhirsuli, patentes, 
ascendentes, fructiferi plurimiim longiores crassioresque floriferis. Cal. semi= 
superus, viridis, rigidus, foliolis ovato-acuminatis, (“+ primim conniventi- 
“bus deindé patulis, 2 paulo inferioribus. Pet. alba, pellucida, venosa, inciso- 
“ emarginata, equalia, brevissimis unguibus purpureis infra nectarium nata. 
“ Nect. membrana in stelle modum plicata persistens angulis oclo, primitm 
“ subluteum, deindé album, posted viride. Vil. alba, plana: anth. didyme, 
“ magne. Stylus bast viridis: stig. cavum rotundum rubrum perforatum. 
“ Florescentia intra calycem conniventem clausum absobvitur2? All. 1. c.) 
Se SEE 
A remarkable annual water-plant, belonging to a genus, 
which although abundantly and very generally dispersed 
over Europe to the south of this country, is so by the means 
of one species only. This has been naturalized in ponds near 
Paris, yet here, where it is said to have been introduced by 
Dr. Solander in 1781, every attempt to bring it to seed in 
the open air has failed. The specimen was sent us by Mr. 
Lambert, who ripened the seed, by raising the plantin 
water in his hothouse at Boyton. 
In-its native region it affects rivers with muddy bottoms, 
ponds, lakes, and ditches round towns. The genus has 
