196 
CONTEIBUTIONS TO BOTANY. 
dentatus, dentibus acutis, medio nervis decurrenti-carinatis. 
Petala 4-5, dentibus calycinis alterna, spathulato-oblonga, 
tenuiter membranacea, sublibera, sestivatione imbricata. Sta- 
mina numero petalorum dupla, uniseriata, subsequalia, petalis 
paullo breviora ; filamenta late loriformia, membranacea, 
sublibera, vel basi laxe agglutinata, 1-nervia, intus stellato- 
pilosula, extus glabra; antherce introrsse, summo filamen- 
torum omnino adnatse, et iis 5-plo breviores, ^-lobse, lobis 
discretis, parallelis, rima longitudinal! dehiscentibus. Pollen 
trigonum, angulis bulla rotunda notatum. Ovarium turbi- 
natum, semisuperum, dimidium inferius calyci adnatum, bine 
post anthesin cito deorsum elougatum, et valde auctum ; dimi- 
dium superius non augescens, bine conicum, liberum, immu- 
tatum, fructum coronans; 1-loculare, imo septulis 4-5 brevibus 
ad placentam centx’alem e basi ortam nexis, et cum carinis 
totidem internis prominulis parietalibus intra stylum per- 
currentibus continuis, hoc modo breviter 4-5-locellatum, 
locellis superne apertis, et lobis calycinis oppositis ; ovula ad 
placentam centralem in quoque locello 2-seriatim affixa, iu- 
feriora pendula, superiora erecta, fere omnia abortientia. 
Stylus simplex, staminibus longior. Stigma clavatum, summo 
4-5-denticulatum. Fructus oblongus, siccus, indehiscens, 
4-5-alatus, alis interdum fere obsoletis, apice summo per- 
sistente ovarii coronatus ; structura Halesice omnino similis, 
sed minor, et substantia nucis tenuior. 
Frutices Japonic^ hahitu Styracis, pilis stellatis tomentellis ; 
folia alterna, acuminato-ovata, argute glanduloso-serrulata ; 
inflorescentia racemosa ; racemuli in ramis novellis axillares 
et terminates. 
1. Pterostyrax corymbosum, Sieb. et Zucc. FI. Japon. i. p. 94. 
tab. 47 ; A. DC. Prodr. viii. p. 269. — In Japonise merid. moh- 
tosis. 
2. Pterostyrax micranthum, Sieb. et Zucc. ; Walpers, Ann. i. 500. 
— In Japonia. 
3. Pterostyrax hispidum, Sieb. et Zucc. ; Walpers, Ann. i. 500. — 
In Japonia. 
On the Development of the Vegetable Ovule called 
‘Anatropous.^ 
Although the changes that take place in the development of the 
vegetable ovule have long since occupied the attention of the ablest 
physiological botanists, it is evident that the real nature of its mode 
of growth is not yet well understood. My first object therefore 
