126 PBAGTIGAL GUIDE TO GARDEN PLANTS 



Cohort 6. Ebbnales. — Trees or shrubs. Flowers regular, 

 hermaphrodite or unisexual. Stamens equal in number to, or 

 twice as many as, or more than, the corolla lobes. Ovary 2- or 

 more celled. 



Natural Orders with these Characters. — EBENACByE (p. 632), 

 Styeace^ (p. 633). 



Cohort 7. Gentianales. — Leaves usually opposite. Corolla 

 regular. Stamens alternate with the corolla lobes and equal in 

 number, or if fewer often alternate with the carpels. 



Natural Orders with these Characters. — OLEACEiE (p. 636), 

 Apocynace^ (p. 644), Asclbpiade^ (p. 646), Loganiace^ 



(p. 648), GENTIANBiE (p. 650). 



***Ovary usually superior. Carpels 2, or rarely 1 or 3. 



Cohort 8. PoLEMONiALES. — Lsaves usually alternate. Corolla 

 regular. Stamens alternate with the corolla lobes and equal 

 in number. 



Natural Orders with these Characters. — Polemoniace^ 

 (p. 658), Hydeophyllacb^ (p. 666), Boeaginb^ (p. 670), 



CONVOLVULACE^ (p. 682), SOLANAGB^ (p. 687). 



Cohort 9. Pbesonales. — Corolla often irregular or oblique. 

 Upper stamen smaller than the others, or often reduced to a 

 staminode or absent. 



Natural Orders with these Characters. — Sceophulaeine.s; 



(p. 701), LENTIBULAEIBiE (p. 728), GrESNEEACE^ (p. 729), BlGNO- 



NiACE^ (p. 781), Pedaline^ (p. 734), Acanthace^ (p. 735). 



Cohort 10. Lamiales. — Corolla often irregular, oblique or 

 2-lipped. Upper stamen often reduced to a staminode or 

 absent. Carpels 1-ovuled or collaterally 2-ovuled. Fruit often 

 enclosed by the calyx, indehiscent. 



Natural Orders with these Characters. — Selagine^ (p. 737), 

 Yeebbnacb^ (p. 738), Labiate (p. 742). 



Division III. MONOCHLAMYDEJE, INCOMPLETE, or 

 ACHLAMYDEM (p. 759 to p. 805). 



Flowers in which the corolla is usually and the calyx often absent. 

 {a) Flowers hermaphrodite, or unisexual or polygamous in a few 

 genera. 



Natural Orders with these Characters. — Nyctagine^ (p. 759), 



iLLECBBEACEiE (p. 761), AMAEANTACBiB (p. 761), ChENOPODIACE^ 

 (p. 765), PHYTOLAGCACB.aE (p. 766), POLYGONACBiE (p. 767). 



(6) Herbs or shrubs. Ovary apocarpous, syncarpous or mono- 

 carpous. 



Natural Orders with these Characters. — AEiSTOLOCHiACByE (p. 772), 

 PiPEBACByB (p. 773). 



