538 
Neque magis accuratam putem Leysseri affirmationem, de Portulaca 
oleracea scribentis “ Corollam sub nostro coelo vix explicat, florens et 
fructificans clauso calyce , Fl. Hal. n. 451.3 quamvis hane roborare 
videatur altera Scholleri, qui ad eamdem speciem adnotat “ Corollam 
explicat circa meridiem, hora 11, 12, caeterum flores clausi, qui et in 
planta decerpta (si tunc aperti) mox clauduntur „ Flor. Barbiens. p. 
112. n. 310.; additum dein in ejusdem operis supplemento (posthumo), 
1181. p. 312., relatum de Leersia oryzoide, ex Schrebero “ Flores e 
vagina egredientes plerumque abortiunt, et tantum in vagina remanentes 
semina proferunt. n De Violis sylvatica (ut credo) et montana con- 
tendit Roth, se referens ad ape alos. ^ Fructificatio in calyce jam clauso... 
peragitur , Tent. Fl. Germ, 2. p. 210. quam observationem nullum 
eomprobavisse memini. Linnaeanam observationem de Subularia aqua- 
tica prius editam a Linnaeo, Fl. Svec. 1737. n. 253. pluribus verbis 
explanavit Lightfoot: « It is very remarkable, that this diminutive plant 
flowers under the water; whereas most other aquatic vegetables emerge 
from that element at the time of flowering. This power of emergence seems 
however the less necessary in this plant, as the petals are scarcely ever 
seen to expand, but connive together, so as most probably to defend the im- 
pregnating Pollen from the injuries of the water , Fl. Scot. p. 337.; 
ut de eadem Subularia sic Smith: « Dr. Hooker confirms our account 
of the flowers being always, several feet under water, where he observed 
them to be constantly expanded, so that the impregnation actually takes 
place in that element. » Engl. Fl. 3. p. 157. cf. Hook. Fl. Lond. ed. 
Grav. V. 4; et hoc idem confirmarunt Reboud, et Guinaud apud Bill., 
et Schultz Archiv. p. 158. Et extant observationes Ramondi, Bastardi 
(ef. Bull. Sc. physiqs. Orleans T. 4. (1912.) p. 164.), Mirbeli, et DC. 
de Ranunculo aquatili sub aqua florente, deque Lobeliis, Lamio am- 
plexicauli, corolla parviflora, et clausa praedito, Leersia oryzoide (Oryza 
clandestina A. Br.) foecundationem corolla clausa perficientibus; item 
de Bergeretia uliginosa, atque de Echinodoro natante, ex St. Hilaire (Aug.), 
et Chautant florentibus, et fructificantibus sub aqua, corolla, ut vi- 
detur, intercipiente aeris portiunculam: itemve de floribus lateralibus /m- 
patientis noli tangere ad marcescentiam staminum et corollarum clausis, 
attamen foecundis. Addamus etiam Vandeliam sessifloram Benth., Scro- 
fularineam, in qua describuntur flores fertiles clausi, steriles aperti; 
cf. Bot. Zeitg. (1867.) n. 9. p. 65. Ast notabilior adhue mihi sese of- 
fieit Tonina fluviatilis Aubl., Guin. Fr. 2. p. 857. t. 330. in fundo 
aquarum ad quatuor pedes, et ultra submersa, florens et frueti- 
cans floribus monoicis, qui tamen in eodem capitulo masculi foemi- 
neique habentur. 
Quod inter floris involucra clausi in quibusdam plantis evenit, idem 
aceidit in Zosteris, quorum flores submersi in vaginis per margines con- 
tiguis occultantur. 
Haee omnia ceu vera recepta oportet credere fieri aeris evolutione 
ex ipso corollae parenehimate , nam credi nequit, in vacuo, aut sine 
aeris portiuncula foecundationem peragi, ut nec de Anandria Siegesb., 
DC., Leibnitiis Cassini, effici posse admisit Tursen apud Linnaeum. 
Amoen. Acad. 1. p. 253.: cf. etiam Cassini Dict. Sc. Nat. T. 25. Par. 
1822.) p. 423. seq. Nec aliter demonstravit Perrier De la Barthie ob- 
servatione a se feliciter acta, qui aeris portiunculam percepit in floribus 
