ANALYTICAL ARTIFICIAL KEY TO THE ORDERS AND 

 ANOMALOUS GENERA IN THIS VOLUME 



Laurace^, 81. 



TlIYMELEACF.^E, 82. 



Cercocaqms in RosACEiB, 32. 



C'HENOrODIACE-E, 79. 



Subclass I. ANGIOSPERMyE continued. 



Division III. APETAL^E : corolla (and sometimes calyx) wanting. [Including the apetalous 

 genera of the preceding Divisions.] 



A. Flowers not in aments. 



1. Ovary and fruit superior, 1-celled and 1-ovulod, or carpels distinct if more than one. 



Stipules sheathing the stem at the nodes. 



A tree : flowers monoecious in globose heads : calyx none. PLATANACEyB, 85. 



Herbs : calyx usually corolla-like : akene triangular or lenticular. PoLYGONACEiE, 77. h. 

 Stipules not sheathing the stem or none. 

 Shrubs or trees. 



Leaves alternate : flowers perfect. 



Calyx 6-])arted : fruit a drupe: anthers opening by valves: odor 



iferous evergreen. 

 Calyx 4-cleft : fruit a berry. 



Calyx tubular, limb deciduous : fruit a tailed akene, 

 Leaves alternate : flowers unisexual : fruit a utricle. 

 Leaves op[)osite. 



Flowers moncecious : capsule 1 -celled by abortion. BuxACEii;, 86. 



Fruit an akene : leaves small and narrow. Coleogyne in Kosace^, 32. 



Fruit a simple samara : leaves jnnnate. Fraxinus in Oleace^, 59. 



Herbaceous, or sometimes woody at base. 



Fruit a utricle : seed lenticular : embryo annular or spiral. 



Flowers with scarious persistent sepals and bracts : no stipules. AMAUANTACEiE, 78. 

 Bracts herbaceous or none : no stipules. ChenopodiacEjE, 79 



Stipules scarious. Illecebrace.*;, 15. 



Fruit a more or less triangular akene : embryo curved. 



B'lowers perfect, on jointL-d pedicels, involucrate. PoLYGONACEiE, 77. 



Akene not triangular : embryo straight. 



Flowers unisexual ; filaments incurved in the bud: leaves simple. UliTfCACE-B, 84. 

 Submerged : flowers axillary, naked : leaves sessile, filiformly 



dissected. CERATOPnYLLACE.s:, 



Flowers naked in a terminal spike : akene reniform : leaves tri- 

 foliate. Achlys in Berberidace*. 2. 

 Carpels several and distinct, 1 -several-ovnled : calyx usually 

 corolla-like. Ranunculace-b, 1. 



2. As in (1), but ovary and fruit inclosed by the calyx and apparently inferior. 



Shrub.s, with scurfy opposite entire leaves: flowers dioecious: fruit 



baccate. 



Herbs : calyx corolla-like : fruit an akene. 

 Leaves simple, opposite, entire, without stipule 

 Jjcaves compound, alternate, stij)ulatc. 



EL.EAr.NACE.«, 83. 



flowei-s involucrate. 



Nyctaoinace.b, 76. 

 Rosace^,, 32. 



3. Ovary and fruit superior, of 2 or more carpels. 



Fruit 2- 4-celled, usually lobed : cells 1 - 2-ovulcd. 



Fleshy maritime diceeious .shrub : ovaries 4-celled, coherent. BATinr.*:, 80. 



Capsule 3-celled, 3-lobed : juice milky : mostly herbaceous. EurnoRBlACEiE, 87. 

 Fruit 4-celled, 4-lobed, compressed, indehiscent : styles 2 : small, 



aquatic, with opposite entire leaves. CAi.i,iTnirilACE;t;, 88. 



Fruit fleshy, 3-celled, 3-lobed : .shrubs with alternate simple leaves. Rhamnace.t:, 27. 



Fruit a double samara : trees with opposite pinnate leaves. SArisoACE.?:, 29. 



Cruciferous herb : po<l small, obcompressed. 



Lepidium in Ckvcifer.*:, 



