364 



MANUAL OF BOTANY 



Carpels two or more, not divaricatingj 

 combined. 

 Calyx valvate, or the limb obsolete. 

 Stamens alternate with the petals if 

 isomerous. 

 Albumen none. Ovules horizontal 



or ascending . . . OnagracecB. 

 Albumen present. Ovules pendu- 

 lous Halo7'agacecp . 



Albumen abundant. Flowers con- 

 spicuous . ... CornacecB. 

 Calyx not valvate. 

 Stamens doubled downwards, Anthers 



with appendages. Leaves ribbed Melastoviacece. 

 Stamens only curved. Anthers short. 

 Leaves dotted . , , . Myrtacem. 



Leaves not dotted. 



Seeds very numerous, minute . Escalloniacecs. 

 Seeds few Bruniacets. 



b. Leaves with stipules. 



Placentas parietal. 



Stipules cirrhose. Gamopetalous . . . CucurhitaceeB. 

 Stipules deciduous. Petals distinct . . Somaliacece 

 Placentas in the axis. 



Stamens, if equal to the petals, alternate with 

 them. 



Leaves opposite JRhisophoraeecs. 



Leaves alternate . . HamaTnelidacea. 



Although it generally happens that the Calyciflorse have dichlamydeous 

 flowers, polypetalous corollas, and perigynous or epigynous stamens, yet 

 many exceptions occur, which should be particularly noted by the student. 

 Thus, we find apetalous plants in the Leguminosm, BosacecB, Saxifra- 

 gacecB, Cunomacem, CrassulacecB, Hamamelidacem, HaloragacecB, Cal- 

 litrichacem, BhisophoracecB, Gotnhretacem, Samydacece, Loasacecs, 

 DatiscacecB, Mesemhryanihace^, ATaliace<E, Garryacece, Myrtacecs, 

 LythracecB, OnagracecB, Passifloracem. Gamopetalous corollas occur in 

 some PapayacecBj Cu-curhitacecB, Belvisiacee^, CrassulacecB^ Broseracctr, 

 Bruniacem, MelastortiacecB, Turneracecpy Cactacece, LecythidacecB, Ara- 

 liacecB. In some Calyciflorse, again, the stamens are wholly or in part 

 hypogynous or nearly so, as in some Connarace(B, LeguminoscSf Saxifra-- 

 gacece, CrassulacecB^ FrancoacecB. 



Unisexual flowers occur as a rule in Callitrichacece, Papayacetr, 

 Garryacece, and Cucurbiiacece, and sometimes in Bosacecp, Hydran- 

 geacecB, PassifloracecB, BihesiacecB, Haloragacecs, CombretacecB, Cor' 

 nacecE, HamavielidacecB, and AraliacecB. 



