Pagina-afbeeldingen
PDF
ePub

CHARACTER GENERICUS.

FLORES

QUERCUS. Tournefort. Linnæi.

* MASCULI

CALYX

STAMINA

** FEMINEI

INVOLUCRUM

CALYX

OVARIUM

FRUCTUS

Sexu distincti in eadem stirpe. amentacei; amenta axillaria, longa, pendula, floribus

supra axim filiformen interrupte glomeratis; sæpius fasciculata.

monophyllus,

4-5 fidus.

membranaceus,

4-10, filamentis ex imo calyce enatis, exertis; antheræ didymæ.

solitarie aut gregatim sessiles in fulcro pedunculiformi, modò brevissimo, modò plus minus elongato, ex superiorum foliorum axillis

enascente.

coriaceum, supra connivens, superstite foramine, limbo subintegrum, uniflorum, persistens. superus, plerumque 6-dentatus, dentibus styli basin arcte cingentibus, persistentibus.

inferum, triloculare, ovulis in singulo loculo geminis; stylus unicus, brevis, stigmata tria reflexa. glans ovata aut globosa, coriacea, non dehiscens, hilo lato no

GENERIC CHARACTER

OF OAK.

FLOWERS of distinct sexes on the same tree. * MASCULINE amentaceous; the amenta or catkins axillary, long, pendulous, with flowers above the filiform axis, interruptedly glomerous, or gathered into small round heads, oftentimes fasciculated.

CALYX of one leaf, membranaceous, 4 or 5 cleft. STAMENS from 4 to 10, filaments arising from the bottom of the calyx, standing out; anthers didymous.

** FEMININE flowers solitary, or in sessile groups,

on a peduncle-formed appendage, sometimes very short, at other times more or less elongated, springing out of the axilla of the superior leaves.

INVOLUCRUM leathery, connivent above, remaining with a hole, the limbus or edge almost entire, of one flower and persistent. CALYX superior, for the most part six-toothed, the teeth closely surrounding the style at its base, persistent.

OVARY inferior, three-celled, the little seeds in each cell by twos, three reflexed stigmas. FRUIT acorn ovate or globular, leathery, not dchiscent

SEMEN

CHARACTER GENERICUS.

tata; cincta involucro, persistente (cupula) in craterem expanso, intus levi, extus tuberculoso, aut squamoso ; uniloculariis, monosperma, (loculis et seminibus abortivis) rarissime 2-3 sperma.

pericarpio conforme, absque perispermo, bilobum, lobis crassis; radicula supera.

ARBORES aut FRUTICES. Folia alterna, stipulacea, stipulis plerumque minimis caducis simplicibus; decidua aut sempervirentia; vernalia pubescentia, mollia; autumnalia coriacea, sæpius glabra.

« VorigeDoorgaan »