450 Anatomie. Morphologie. — Morphologie der Angiospermen. 



ß. Flores alterni vel ad verticilla terna gemini, ad quaterna terni ; raro oppositi, sed 

 simul calyces 17—33 mm. longi. 



§ Calycis lobus dorsalis ceteris aequalis vel paullo major, raro majusculus neque 

 vero ceteros valde superans. 



t Calyx 3—11, raro 13, rarissime 15 mm. lougus; pet. 6 aequalia vel 2 dorsalia 

 ceteris paullo minora majorave, omnia tertiam calycis partem longitudine 

 aequantia vel superantia; stamina scmper infra tres quartas calycis partes 



inserta Sect. IV. Bdlsamona. 



X Ovula 23 — 2. 



* Glandula cupuliformis Subs. 1. MelieyatUum. 



** Glandula dorsalis. 



Stam. tubum longe non aequantia vel saltem Stylus ovario multo 



brevior, sed semina margiue obtusa . . Subs. 2. Melanium. 

 00 Stam. tubum aequantia vel superantia, vel, dum multo breviora, 

 semina manifeste marginata. 



X Semina marginata Subs. 3. Euhalsamona. 



_L _L Semina margine obtusa. 



y Fol. sessilia vel subsessilia; petala nunquam persistentia. 

 / Glandula subtus convexa et plerumque obtuse carinata, supra 

 semper fere plana vel concava . Subs. 4. Hilairea. 

 II Glandula subtus excavata , supra maxime convexa , valde 

 detiexa, obtusissima; ovula 3, rarissime 4—5 



Subs. 5. Trispermiim. 

 1 y Fol. saltem inferiora petiolis plerumque longiusculis insidentia; 

 interdum petioli breves, sed siraul petala etiam in calyce 



fructifero persistentia Subs. 6. Pseudocircaea. 



X X Ovula circiter 50. (Species Cubensis.) . . . Subs. 7. Pseudolobella. 

 ft Cal. 17—34, raro 13-17 mm. longus, saepe cocciueus; petala plerumque 6, 

 calyce multoties breviora, raro omnia magna, saepe nulla; stamiua semper ad 

 tres quartas calycis partes vel altius inserta. 

 X Cal. crassus, dorso convexus, fauce vix ampliatus Sect, V. Melvilla. 



* Flores oppositi ternive , in racemis distinctis simplicibus ; petala 

 nulla Subs. 1. Eumelmlla. 



** Flores alterni. 



Ovula 5—23; ovarium haud gibbum. 



\_ Lobi calycini margine haud ciliati, interdum brevissime hir- 



telli Subs. 2. Pacliycalyx. 



J__L Lobi calycini margine ciliis longis, basi tauquam tuberculatis, 

 apice haud glanduliferis densissimis muniti. (Species omnes 



mexicanae.) Subs. 3. Erytlirocdlyx. 



00 Ovula 45 — 120; ovarium dorso infra stylum gibbere plerumque mani- 

 festo instructum. (Species mexicanae.) . Subs. 4. Polyspermmn. 

 X X Calyx iuferne gracillimus vel gracilis, plerumque a medio ad apicem dilatatus 

 (Species mexicanae et centro-americanae.) . . Sect. VII. Leptocahjx. 

 §§ Calycis nunquam coccinei lobus dorsalis maximus, valde productus. (Species 



mexicanae, unica boreali-americana.) Sect. VI. Heterodon. 



f Squamulae infra petala 2 dorsalia nuUae vel subuullae Subs. 1. Lopliostomum. 

 tt Squanuilae infra petala 2 dorsalia majusculae, complanatae, verticaliter insertae ; 



cal. 9 ' 12 mm. longus Subs. 2. Glossostomum. 



b. Staminorum duorum brevium nervi intus infra stamina ad costarum instar maxime 



prominentes ovariique dorso adpressi Sect. VIII. Diploptychia. 



a. Calycis costae 2 interiores pilis retrorsum versis hirtelli Subs. 1. Triclioptycliia. 

 ß. Calycis costae 2 interiores glabrae Subs. 2. Leioptycliia. 



