KEY TO THE FAMILIES OP CLASS L 



109 



II. 



Monopetalons Division. Corolla with the petals more or less united into one piece, 

 which rank in other divisions are raarlsecl tO 



(Those 



A« CouoLLA ON THE OVARY, 1. e. tube of calyx coherent. 



Stamens united by their anthers, and 



Not by tlieir filaments. Flowers in heads, with a calyx-like involucre, Cojiposite F. 164 



Also generally by their filaments, more or less. Flowers not in heads. 



Corolla irregular, split down one side. Flowers perfect. Lobelia 



Corolla regular, succulent vines, with tendrils. Flowers monoecious, tGouRD 



Stamens separate from each other, and 



Inserted on the corolla. Leaves opposite or whorled. 



Leaves opposite, without stipules. Head of flowers with an involucre, Teasel F. 164 



Leaves opposite, without stipules. Head, if any, without an involucre. 

 Stamens two or three fewer than the 5 lobes of the corolla. 

 Stamens as many as the lobes of the corolla, or one fewer. 

 Here one might expect to find the 

 Leaves whorled, without stipules, ) 

 Leaves opposite, with stipules, ) 

 Inserted with, but not on, the regular corolla. 



Stamens as many as the lobes of the corolla. Herbs, Campanula 



Stamen? twice as many as the Ipbes of the corolla. Woody plants, • Hucklebekuy 



F. 167 

 F. 164 



F. 164 

 F. 161 

 F. 19] 



Madder Fi 16Jk 



F. 167 

 F. 168 



Valerian 

 Honeysuckle 



flllRABILIS 



B> Corolla on the receptacle below the ovary, i. c. Calyx fijee (eJipept in Brookweed). 

 1. Stamens iiwrc in number than the lobes of the corolla. 



Leaves compound: pod one-celled. Flowers commonly irregular. 



Stamens 10 or rtirely more when the flower is regular. 



Stamens 6 in two sets. Petals 4, united, 

 Leaves simple or palmately divided. Stamens many, monadelphous in a tube, 

 Leaves simple, undivided. Stamens united only at the bottom, or separate. 



Stamens very many, adhering to the base of the corolla, .. 



Stamens on the corolla, twice or four times as many as its lobes. 



Stamens separate from the coi'olla, twice as many as its lobes, 



2. 



tPULSEF. 141 



fFusiiTOUY F. 123 



t.MALLOWF. fS'l 



t Camellia F. 134 

 Ebony F. 172 

 Heath F. 168 



Stamens just as many as the lobes of the regular corolla^ 5, 4, or rarely 6 or 



Stamens one opposite each division of the corolla. 



Styles 5: calyx a chafl'-like cup: petals 5, almost distinct, 

 Style 1. (Petals sometimes almost distinct,) 

 Stamens alteraiate with the divisions or lobes of the corolla, 5 or r^.ely 4, 

 Inserted on the receptacle, ' 



Inserted on the corolla, but connected more or less with the stigma. Juice 

 milky. Ovaries and pods 2 to each flower. 

 Anthers lightly adhering to the stigma: filaments monadelphous. Milkweed F. 



Anthers only surrounding the stigma: filaments distinct, Dogbane F. 



Inserted on the corolla, free from the stigma. 



Leadwoi;t F. 173 

 Primrose F. 173 



He.'VthJ'. 168 



188 

 187 



