nes 
259 
TRAPA natans. 
European WVater-caltrops. 
TETRANDRIA MONOGYN/A, 
Nat. ord. Hyprocuanipes. Jussieu реп. 67. 
Oxacranta, Lamarck et Decaud. fl. franç. 4. 418. 
TRAPA. Vid. Append. hujus vol. in loco, 
Т. natans, nucibus quadricornibus, spinis patentibus. Lin. suppl. 198. 
Trapa natans, Lina. sp. pl. 1. 175. Gaertn. sem. 1. 197. 1. 26. f 5. Allion. 
pedem. n. 872. Ұры. siles, n. 246, Hort. Kew. 1. 164. са. 2. 1. 267. 
Lamarck encyc. З. 669. illustr. t. 75. Villars dauph. 9. 840. Lam. et 
Decand. fl. frang. 4. 418. Schkuhr handb. 1. 85. t. 25. Willd. sp. pl. 1. 
681; (excl. Rheede mal.) Prod. flor. grec. 1. 10%. 
Trapa foliis natantibus, petiolis ventricosis. Hall. helo. n. 527. 
Tribulus aquaticus. Cam. epit. 715. Bauh. pin. 194. Ger. emac. 84. 
Rhizoma natans, nodis promens radices compositas è radiculis numerosis 
retaceo-capillaribus in axem. communem pyramidatim connatis; caudex con- 
Jerte foliosus, foliis super aquam in МЕГАН multiradiatam dispansis, longd 
petiolatis, laminà  rhombeá superno subrotundá dentatá dentibus bimu- 
cronatis, diametro sesquiunciali, vividé virentia, infra pubescente ; petiolis 
Зеро longioribus lamind, hirsutiusculis, adultis supern? extumescentibus in 
utrem oblongum medullá cellulosá repletum cujus ope natat planta. Flores 
plurimi, parvi, submcrsi; pedunculi breviores peliolis, subi irsuti, patentes, 
ascendentes, fructiferi plurimüm longiores crassioresque Soriferis. Cal. semi- 
superus, viridis, rigidus, foliolis ovato-acumiaatis, (“ primum conniventi- 
“bus deinde patulis, 2 paulo inferioribus. Pet. alba, pellucida, venosa, inciso- 
“ emarginata, æqualia, brevissimis unguibus purpureis infra nectarium nata. 
** Nect. membrana in stelle modum plicata persistens angulis octo, primùm 
* subluteum, deindè album, posted viride. Fil. alba, plana: anth. didyma, 
“ magne. Stylus basi viridis: stig. cavum rotundum rubrum perforatum. 
** Florescentia intra calycem conniventem clausum absolvitur?” АН. 1. с.) 
A remarkable annual water-plant, belonging to а 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 пеш: 
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 bas failed. ‘The specimen was sent us by Мг. 
Lambert, who ripened the seed, by raising the plant in 
water in his hothouse at Boyton. 
- Та its native region it affects rivers with muddy bottoms, 
ponds, lakes, and ditches round towns. Тре genus has 
