We avail ourselves of a vacant leaf or two in tliis number 

 to present our Botanical friends with a revision of the whole 

 of the genera of the natural order to which Pentstemon 

 belono-s. For this valuable contribution we are indebted 

 to George Bentham, Esq. the learned author of the Genera 

 and Species Labiatarum. 



Tribus I. Verbasce.^, Bartl. Corolla tubo abbreviato vel subgloboso, 

 limbo explaiiato 4-5-fi{lo vel bilabiato non ringente. Stamina fertilia •2-5, saepius 

 (leclinata. Antherae approximatse vel cohajrentes nunc uniloculares nunc subbilo- 

 culares loculis divaricatis confluentibus. Capsula bivalvis septicide dehiscens, 

 valvulis ssepe bifidis, dissepimento e marginibus valvulorum infiexis duplicate solu- 

 bili. Semina nuda. Genera Solanaceis rotatis affinia sed sestivatione corollre 

 abunde distincta. 



* Corolla subrotata b-loba. 



1. Verbascum, Linn. Stamina fertilia 5. 



2. Celsia, Linn. Stamina fertilia 4. Capsula globosa usque ad basin 

 dehiscens. 



3. Alonsoa, Ruiz et Pav. Stamina fertilia 4. Capsula ovato-oblonga 

 vix ad medium dehiscens. Flores torsione pedicelli resupinati. (Hemimeris Avct. 

 quoad species Americana^. 



* * Corolla bilabiata labiis concavis. 



4. Jovellana, Cav. Corollse lobi concavi subagquales patentes. 



5. Calceolaria, Linn. Corollae lobus inferior incurvus calceolatus. 



* * * Corolla tubo subgloboso limbo valde incequali. 



6. Scrophularia, Linn. 



Tribus II. Hemimeride^e. Corolla tubo abbreviato, fauce concava, limbo 

 explanato lacinia infima (saepe bifida) basi concava 1-2-saccata vel calcarata. 

 Stamina fertilia 2 vel 4 didynama adscendentia. Antherae approximatae unilocu- 

 lares vel biloculares loculis divaricatis. Capsula bivalvis, loculicide dehiscens val- 

 vulis integris bifidisve vel septicide dehiscens valvulis bifidis, rarius indehiscens, 

 dissepimento e marginibus valvularum inflexis duplicate solubili vel rarius 

 concreto. ^ 



* Corolla ecalcarata breviter bisaccata. Capsula rjlobosa. 



7. Angelonia, Humb. et Kunth. Capsula loculicide dehiscens valvulis 

 integris. 



8. Phylacanthus, Nees et Mart. Capsula indehiscens. 



9. Hemimeris, Linn. Capsula loculicide dehiscens septicide bipartibilis vel 

 dehiscens. (Diascia, Link.) 



** Corolla calcarata. Capsula compressa. apice trvncata, 



10. Nemesia, Vent, 



Tribus III. Antihiuiine.e, Chavannes. Corolla tubulosa limbo personate 

 vel ringente bilabiato rarius subaequali. Stamina fertilia 4 didynama. Antberse 

 per paria approximatae biloculares. Capsula dentibus seu valvulis pluribus oper- 

 culisve circumscisJifis dehiscens vel irregulariter rumpens. Semina nuda vel testa 

 arilliformi inclusa. 



