We avail ourselves of a vacant leaf or two in this number 
to present our Botanical friends with a revision of the whole 
of the genera of the natural order to which Pentstemon 
belongs. For this valuable contribution we are indebted 
to George Bentham, Esq. thé learned author of the Genera 
and Species Labiatarum. 
Tribus I. VERBAscE=, Bartl. Corolla tubo abbreviato vel subgloboso, 
limbo explanato 4-5-fido vel bilabiato non ringente. Stamina fertilia 2-5, sepius 
declinata. Anthere approximate vel coherentes nunc uniloculares nunc subbilo- 
culares loculis divaricatis confluentibus. Capsula bivalvis septicide dehiscens, 
valvulis sepe bifidis, dissepimento e marginibus valvulorum inflexis duplicato solu- 
bili. Semina nuda. Genera Solanaceis rotatis affinia sed estivatione corolle 
abunde distincta. 
* Corolla subrotata 5-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 Auct. 
quoad species Americana). 
** Corolla bilabiata labiis concavis. 
4. JovELLANA, Cav. Corolle lobi concavi subzquales patentes. 
5. CALCEOLARIA, Linn, Corolla lobus inferior incurvus calceolatus. 
*** Corolla tubo subgloboso limbo valde inequali, 
6. SCROPHULARIA, Linn. 
Tribus II. HEMIMERIDEZ, Corolla tubo abbreviato, fauce concava, limbo 
explanato lacinia infima (ssepe bifida) basi concava 1-2-saccata vel calcarata. 
Stamina fertilia 2 vel 4 didynama adscendentia. Antherz approximate 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 duplicato solubili vel rarius 
concreto. 
* Corolla ecalcarata breviter bisaccata. Capsula globosa. 
; 7. ANGELONIA, Humb. et Kunth. Capsula loculicide dehiscens valvulis 
integris. 
8. PHYLACANTHUS, Nees et Mart. Capsula indehiscens, 
9. HEmMIMERIS, Linn. Capsula loculicide dehiscens septicide bipartibilis vel 
dehiscens. (Diascia, Link.) 
** Corolla calcarata. Capsula compressa apice truncata. 
10. Nemesia, Vent. 
Tribus IIl. Antirruinex, Chavannes. Corolla tubulosa limbo personato 
vel ringente bilabiato rarius subequali. Stamina fertilia 4 didynama. Anthere 
per paria approximate biloculares. Capsula dentibus seu valvulis pluribus oper- 
culisve circumscissis dehiscens vel irregulariter rumpens. Semina nuda vel testa 
arilliformi inclusa, 
