602 



CLXVI. BIGNONIACE^. 



iiii Calalpii. 

 Seed (mag.). 



Bignonia grandijtora, 

 Stamen (mag.). 



B. grandijlora. 



Transverse section of 



ovary (mag.). 



Hif/nonia. 

 Pistil (mag.). 



IS. Cata/i'd. 

 Embryo (mag.). 



equalling its segments (Incarvillea) . COROLLA monopetalous, hypogynous, deciduous ; 

 tube short ; throat dilated ; limb usually of 5 segments, bilabiate, rarely sub-regular 

 (Zeyhera), sostivation usually imbiioite. STAMENS 5, inserted on the corolla-tube, 

 very rarely all fertile (Calosanthes) and sub-equal, generally 4, didynamous, the fifth 

 with no anther or absent, sometimes the 2 posterior only fertile (Catalpa) ; anthers 

 introrse, 2-celled, cells parallel and contiguous, sometimes united at the top only, 

 and diverging, dehiscence longitudinal. DISK glandular, girding the base of 

 the ovary. OVARY superior; cells 2, an tero- posterior, sometimes 1-celled (Eccremocar- 

 pus) ; style simple, filiform ; stigma 2-lamellate or- -fid ; ovules more or less numerous, 

 usually horizontal, anatropous, inserted in vertical lines along the edges of the 

 septum in the 2-celled ovaries, or parietal in the 1-celled. CAPSULE ovoid or 

 siliquiform or compressed, 1-2-celled, sometimes pseudo-4-celled (Tourretia), generally 

 2-valved, rarely opening by a posterior longitudinal slit (Incarvillea, Amphicome) ; 

 valves parallel or perpendicular to the septum, sometimes leaving the seminiferous 

 septum free, sometimes septiferous or placentiferous. SEEDS generally transverse, 

 imbricate, 1- or many-seriate, margin winged, wing sometimes fimbriate (Amphi- 

 come, Catalpa}, very rarely apterous (Argylea}. EMBRYO straight, exalbuminons ; 

 radicle near the hilum, usually centrifugal, with the raphe next the septum ; some- 

 times centripetal, the seed being perpendicular to the septum (Jacaranda), sometimes 

 superior from the seed becoming pendulous during development (Incarvillea, Amphi- 

 come) ; cotyledons plane, foliaceous, reniform or bilobed. 



TRIBE I. EUBIONONIE^. 



Septum parallel to the valves ; dehiscence marginal, that is, taking place along 

 the edges of the septum. 



PRINCIPAL GENERA. 



*Bignonia. Pachyptera. Fredericia. Calosauthes. 



Arrabideea. * Lundia. Cuspidaria. Anemopaegma. 



Pithecoctenium. Adenocalymna. 



