x DICOTS. VERTICILLATAEJUGLANDALES 



A; B; a 



DICOTYLEDONEAE 



[Embryo with two cots.; stem with open bundles; 1. usu. net-veined; 

 fl. usu. not 3-merous.] 



Archichlamydeae (Orders i 30) 



(Fl. achlam., haplochlam., or diplochlam., usu. polypet., rarely 

 sympet. or apet.) 



A. Ov. with 20 or more embryo sacs, and chalazogamic fert. (Order i). 



1. VERTICILLATAE. Woody pi. of Equisetum habit; 3 fls. in 



catkin-like spikes, ? in heads, at end of twigs; c? with 2 median 

 bractlike P and a central sta., ? naked, G (2) with 2 threadlike 

 stigmas, 2-loc., the post, sterile, the other with 2 4 erect orthotr. 

 ov.; fr. indeh. ; no endosp. 



B. Ov. usu. with only i embryo sac (Orders 2 30). 



a. Fls. naked or with haplochlam. bract-like P (Orders 2 12). 



2. PIPERALES. L. simple, stip. or not, and spikes of small achlam. 



or haplochlam. ? or $ ? fls.; A i to, G i 4, free or united. 



3. SALICALES. Woody with simple alt. stip. 1. and spikes of dioec. 



achlam. fls., disc cup-like or reduced to scales; A 2 <x> , G (2), 

 i-loc. with parietal plac. and oo anatr. ov. ; caps, with oo seeds, 

 seeds small with basal tuft of hairs and no endosp. 



4. GARRYALES. Woody pi. with opp. evergr. 1. and fls. in catkin- 



like panicles, $ ? ; <J P 4, A 4^ ? naked, G (2 3), i-loc. with 

 2 ov. ; endosp. 



5. MYRICALES. Woody, usu. with simple 1. and fls. in simple, 



rarely cpd. spikes, <f ? achlam., sometimes with bracts at base; 

 A 2 16, usu. 4, G (2), i-loc. with i basal orthotr. ov. and 2 stigs.; 

 porogamous; drupe with waxy exocarp; no endosp. 



6. BALANOPSIDALES. Woody with simple 1.; <? fls. in spikes, 



haplochlam, ? sol. surrounded by oo scaly bracts; G (2), im- 

 perfectly 2-loc. each with 2 ascending ov. ; drupe, 



7. LEITNERIALES. Woody with alt. entire 1. and spikes of dioec. 



fls.; <? achlam., A3 12, ? haplochlam., P of small scaly united 1., 

 G i with long style and i amphitr. ov.; drupe; thin endosp. 



8. JUGLANDALES. Woody with alt. usu. pinnate exstip. 1. and 



spikes of achlam. or haplochlam. <J ? fls.; A 3 40, G (2), i-loc. 

 with i basal orthotr. ov. ; chalazogamic; fr. drupe or nut-like; 

 no endosp. 



