104 HISTOIRE DES PLANTES. 
GENERA 
1. BROMELIEÆ. 
1, Billbergia Taux8. — Flores hermaphroditi ; receptaculo sacci- 
formi germen intus adnatum fovente ultraque illud in cupulam 
margine perianthiiferam producto. Sepala 3, libera obtusa torta, 
sinistrorsum obtegentia. Petala alterna 3, multo longiora erecta, 
apice æqualiter v. sub-2-labiatim patula, nunce revoluta, in alabastro 
torta dextrorsumque obtegentia. Laminæ verticales 2, petalis inte- 
riores iisque nisi ad margines integras v. undulatas longitudinaliter 
adpatæ, apice attenuatæ obtusæ v. 2-lobæ, nunc ibi evanidæ v. omnino 
deficientes. Stamina 6, quorum alternipetala 3, libera; oppositi- 
petala autem sublibera v. imo v. ad medium petalum connata, 
compressa v. (Quesnelia) latiora fereque ad apicem petalo adnata; 
anthera dorso cum filamento continua, nunc versatili, oblonga; 
Joculis ima basi hiberis, introrsum rimosis. Squamæ 2, ad stamen 
quodque laterales, receptaculi margini affixæ, aut supra concavæ 
fimbriato-laciniatæ, aut plus minus verticales planæque. Germen infe- 
rum, 3-loculare, extus glabrum, costatum v. rugosum, sæpe farina- 
ceum ; glandulis septalibus nectariferis evolutis, supra germen apertis; 
stylo erecto obtuse 3-gono tubuloso; ramis stigmatosis membranaceis 
induplicatis, margine papillosis, inter se plus minus tortis. Ovula in 
loculis singulis œ, placentæ axili brevi v. ellipsoideo-2-lobæ inserta 
anatropa; chalaza plus minus in conum rectum v.areuatum producta. 
Fructus indehiscens, plus minus carnosus; seminibus œ; albumine 
farinaceo ; embryone infero. — Herbæ perennes rupibus v. arboribus 
affixæ; caule brevi crassiusculo nunc sublignoso, aut simplici, aut 
e basi ramoso sympodiali. Folia rosulata rigida elongata eoncavo- 
convexa, basi nunc dilatata vaginantia, sæpe extus horizontaliter 
