THE MONOPETALOUS ORDERS. 427 



Anthers two-celled. ERICACE^:, p. 436. 



Anthers one-celled. EPACRIDACEJE, p. 439. 



Group 5. Ovary free, or rarely coherent with the calyx, several-celled, with 

 a single ovule (or at least a single seed) in each cell. Seeds mostly albu- 

 minous. Stamens definite, as many as the lobes of the (sometimes almost 

 polypetalous) corolla and alternate with them, or two to four times as 

 many : anthers not opening by pores. Trees or shrubs. 



Stamens as many as the lobes of the corolla and alternate with them. 



AQUIFOLIACEJE, p. 439. 

 Stamens more numerous and all fertile. 



Flowers polygamous : calyx free. EBENACEJ!, p. 439. 



Flowers perfect : calyx more or less adnate. STYRACACEJE, p. 440. 



Stamens as many fertile as there are lobes of the corolla and opposite them ; 



and with a sterile series alternate with them. SAPOTACE^E, p. 440. 



Group 6. Ovary free, or with the base merely coherent with the tube of the 

 calyx, one-celled, with a free central placenta. Stamens inserted into the 

 regular corolla opposite its lobes ! which they equal in number. Seeds 

 albuminous. 



Shrubs or trees : fruit drupaceous. MYRSINACE^, p. 440. 



Herbs: fruit capsular. PRIMULACE^E, p. 440.. 



Group 7. Ovary free, one-celled with a single ovule ; or two-celled with 

 several ovules attached to a thick central placenta. Stamens as many as 

 the lobes of the regular corolla or the nearly distinct petals. Seeds albu- 

 minous. 



Ovary two-celled : style single : stamens 4. PLASTAGINACE*:, p. 441. 



Ovary one-celled: styles and stamens 5. PLUMBAGINACE.E, p. 442. 



Group 8. Ovary free, one- or two- (or spuriously four-) celled, with numer- 

 ous ovules. Corolla bilabiate or irregular; the stamens inserted upon its 

 tube, and mostly fewer than its lobes. 



Ovary one-celled with a central placenta. Stam. 2. LENTIBULACE.E, p. 443. 

 Ovary one-celled with parietal placentae. OROBANCHACE^E, p. 443. 



Ovary spuriously 4-5-eelled : seeds exalbuminous. Subord. SESAMES, p. 444. 

 Ovary two-celled : placentae in the axis. 



Seeds indefinite, winged: albumen none. BIGNONIACE^E, p. 444. 



Seeds few, wingless: albumen none. Corolla convolute in estivation. 



ACANTHACEJJ, p. 444. 



Seeds mostly indefinite : albumen copious. Corolla imbricative in aestiva- 

 tion. SCROPHULARIACE./E, p. 445. 



Group 9. Ovary free, two- to four-lobed, and separating or splitting into as 

 many one-seeded nuts or achenia, or drupaceous. Corolla regular or ir- 

 regular; the stamens inserted on its tube, equal in number or fewer than 

 its lobes. Albumen little or none. 



Stamens 4, didynamous, or 2. Corolla more or less irregular. 



Ovary not 4-lobed. VERBENACE^E, p. 446. 



