112 



KEY TO THE FAMILIES AND GENERA 



130, SOLANACE.fi. 



A. Stamens didynamous, the fifth (and some- 

 times also one of the pairs) smaller, abor- 

 tive or missing. 



B. Number of perfect stamens usually 5. 

 c. The stamens affixed at middle of tube or 



lower 1. Petunia* 



cc. The stamens affixed at apex of tube 2. Nierem- 



BB. Number of perfect stamens usually 4 or 2. [bergia. 



c. Corolla-tube cylindrical; limb oblique; 



perfect stamens 2 3. Sckizanthus. 



cc. Corolla obliquely funnel-shaped; perfect 



stamens 4, didynamous 4. Salpiglossis. 



CCC. Corolla-tube cylindrical, straight; anthers 

 of the 2 short stamens dimidiate, of the 



longer ones 2^-celled 5. Browallia. 



cccc. Corolla-tube twisted ; anthers as in Browal- 

 lia 6. Streptosolen. 



ccccc. Corolla-tube long, not twisted, slightly 

 widened at apex; 4 perfect anthers with 



confluent cells 7. Brunfelsia* 



AA. Stamens all perfect not didynamous, nor- 

 mally 5. 

 B. Seeds little, if at all, flattened. 



c. Fr. a few-seeded berry 8. Oestrum. 



cc. Fr. a many-seeded caps. 



D. Corolla with a narrow tube and short 



spreading lobes 9. Fabiana. 



DD. Corolla funnel- or salver-shaped; limb 



equal or oblique 10. Nicotiana. 



BB. Seeds flattened. 

 c. Fr. a caps. 



D. Corolla-lobes plicate. 



E. Caps. 4-K:elled, and 4-valved (some- 

 times indehiscent) 11. Datura. 



EE. Caps, circumscissile above the middle. 12. Scopolia. 



DD. Corolla-lobes imbricate 13. Hyoscya- 



CC. Fr. berry-like, or at least indehiscent. [mus. 



D. Limb of corolla subequally plicate or 

 divided into valvate or induplicate 

 lobes. 



. Anthers longer than filament, con- 

 nivent connate in a cylinder or 

 cone, acuminate at apex or dehis- 

 cent by 2 apical pores. 

 F. Connective variously thickened on 



back 14. Cyphoman- 



FF. Connective slender or obsolete. [dra. 

 G. The anthers acuminate, hollow 

 at tip, dehiscing by a longi- 

 tudinal crack 15. Lycopersi- 



GG. The anthers opening by an [cum. 



apical pore which is sometimes 

 continued into a longitudinal 



crack 16. Solanum. 



EX. Anthers free, with parallel cells, and 



dehiscing by a longitudinal crack. 



F. Stamens affixed above middle of 



tube 17. Salpichroa. 



FF. Stamens affixed near the base of 



tube. 

 G. Corolla nearly rotate or broadly 



bell-shaped. 



H. Fruiting calyx hardly en- 

 larged. 18. Capsicum. 



BB. Fruiting calyx inflated or 



bladdery. 



i. Calyx cut shortly or to mid- 

 dle 19. Phyxdit. 



n. Calyx parted to base 20. Nicandra. 



GO. Corolla tubular or narrowly fun- 

 nel-shaped 21. lockroma. 



DD. Limb of corolla more or less imbricate, 

 flat and distinct or connected by 

 induplicate sinuses. 

 B. The lobes imbricated from the base, 



not plicate. 

 F. Plants woody. 



G. Berry with 4 stones, each 1-2- 



seeded 22. Grabowskia. 



GO. Berry with 2 cells, each l-oo- 



seeded 23. Lytium. 



FF. Plants herbaceous 24. Atropo. 



EE. The sinuses of the corolla induplicate 

 between the lobes. 



F. Calyx long and tubular 25. Solandra. 



FF. Calyx leafy, 5-fid, increasing in fr. .26. Mandragora, 



131. NOLANACE.fi. 

 Single genus ; Nolana. 



132. SCROPHULARIACE.fi. 



Series 7. PSEUDOSOLANE.E. Lys. all alternate: infl. simple, 

 oentripetal; corolla hardly if at all bilabiate; the 2 posterior lobes 

 external in the bud. 



A. Corolla-tube short, somewhat bell- 

 shaped: American species 1. LEUCOPHTLI.L-M 



[TRIBE. 

 AA. Corolla subrotate: Old World species... 2. VERBASCUM TRIBE. 



Series 2. ANTIRRHINIDE.E. Lvs. prevailingly opposite, at least 

 the lower: infl. simple or compound, partially centrifugal, i.e., the 

 peduncle cymosely few- to several-fld.; posterior lip or lobes of 

 corolla generally external in the bud. 



A. Corolla bilabiate; lips inflated, concave. 3. CALCEOLARIA 

 AA. Corolla bilabiate or nearly regular; [TRIBE. 



lips nearly plane. 

 B. Corolla saccate or spurred. 



c. Tube wanting 4. HEMIMERIS TRIBE. 



cc. Tube present 5. ANTIRRHINUM 



BB. Corolla-tube not saccate nor spurred. [TRIBE 



c. Infl. centrifugal, cymose, usually 



compound, rarely sub-simple.. .. 6. CHELONE TRIBE. 

 cc. Infl. centripetal. 



D. Anthers 1-celled 7. MANULEA TRIBE. 



DD. Anthers 2-celled 8. GRATIOLA TRIBE. 



Series 3. RHINANTHIDE.E. Lvs. various: infl. simple or com- 

 pound; corolla-lobes variously imbricated, the anterior or lateral 

 ones usually exterior. 



A. Anther-cells contiguous at apex and 



usually confluent: plants not parasitic. 9. DIGITALIS TRIBE. 

 AA. Anther-cells everywhere distinct: plants 



often root-parasitic. 

 B. Corolla-lobes all flat, usually spread- 

 ing 10. GERARD: A TRIBE. 



BB. Corolla with posterior lip erect, con- 

 cave or galeate; anterior lip often 

 spreading 11. EUPHBASIA TRIBE. 



1. Leucophyllum Tribe. 



Corolla-lobes 5, subequal, spreading 1. Leucophyl- 



[lum. 



2. Verbascum Tribe. 



A. Stamens 5 2. Verbascum. 



AA. Stamens 4 3. Celsia. 



3. Calceolaria Tribe. 



The only genus 4. Calceolaria. 



4. Hemimeris Tribe. 



A. Corolla more or less rotate, resupinate, the 



grooves inconspicuous or obsolete 5. Alonsoa. 



AA. Corolla spread out flat, swollen or saccate 



under anterior lip 6. Angelonia. 



AAA. Corolla flat or concave, with 2 basal spurs or 



pouches 7. Diascia. 



AAAA. Corolla-tube short with 1 spur or sac on the 



anterior side 8. Nemesia. 



5. Antirrhinum Tribe. 



A. Throat has a prominent palate. 



B. Corolla spurred 9. Linaria. 



BB. Corolla saccate or gibbous at base 10. Antir- 



AA. Throat has no palate. [rhinum. 



B. Caps, opens by 2 apical pores which are 



sometimes confluent 11. Anar- 



BB. Caps, opens by transverse holes or irregu- [rhinum. 



larly. 



c. Calyx ample, membranous 12. Rhodochiton. 



cc. Calyx smaller, herbaceous 13. Maurandia. 



6. Chelone Tribe. 



A. Staminode often elongated. 



B. Caps, loculicidally dehiscent 14. Tetranema. 



BB. Caps, septicidally dehiscent, 

 c. Fls. bilabiate. 



D. Anterior lip with middle lobe folded 



upon itself and inclosing the stamens. 15. Cottinsia. 

 DD. Anterior lip of 3 flat spreading lobes. 



E. Seeds winged 16. Chelone. 



EE. Seed not winged 17. Pentstemon. 



cc. Fls. with all the lobes flat, spreading and 



subequal 18. Ruaaslia. 



AA. Staminode usually in the form of a scale at 



apex of corolla-tube 19. Scrophu- 



AAA. Staminode small, minute or 0. [laria. 



B. Stamens usually exserted. 



c Calyx 5-parted : caps, tardily dehiscent ... 20. Phygelius. 



cc. Calyx cup-shaped: berry indehiscent 21. HaUeria. 



BB. Stamens included ; calyx 5-cut. 



c. Fr. an indehiscent berry 22. Teedia. 



cc. Fr. a loculicidal caps 23. Paulo wnia. 



7. Manulea Tribe. 



A. Calyx bilabiate or 2-parted 24. Zalunan- 



[skya. 

 AA. Calyx 5-parted 25. Chaenostoma. 



