99 



as ornaments for the Corinthian pillars. The roots of Ekinacanthus 

 communis, boiled in milk, have been used for the cure of ringworm, 

 and also for snake bites. 



The Order includes from 1300 to 1400 species. 



KEY TO TRIBES. 



Corolla lobes twisted in bud. Calyx minute, annular. A. Thu^^ergie^ 



Corolla lobes twisted in bud. Style 2-fid, one of 

 the lobes often tooth-like or obsolete. Calyx 

 or bracteoles often conspicuous. B. Ruelliej;. 



Corolla imbricate in bud, unilabiate. C. Acanthe^. 



CoroUa imbricate in bud, 2-labiate or sub-equal. 



Style equally 2-fid or sub-entire. D. Justicie^. 



KEY TO GENERA. 



A. THUNBERGIEiE. 

 Calyx small, hidden by two leafy bracts. Thunbergia. 



B. RUELLIE^. 



Ovules 3 or more in each cell of the ovary. 1 



Ovules 2 in each cell of the ovary. 2 



1 Capsules with seeds in upper part, cylindric 



and solid at base. Ruellia. 



2 Placenta not rising elasticaUy from base of the 



capsule. 3 



2 Placenta rising elastically from base of capsule. 4 

 3 Stamens 4, perfect. Dischoriste. 



3 Stamens 2, w^ith or without rudiments of others, ChjiLTACANthus. 

 4 Floral leaf containing 3-1 ebracteate flowers. Phaylopsis. 



C. ACANTHE.E. 



Calyx 4-parted, segments unequal. Undershrubs, 



often spiny. Blepharis. 



Calyx 5- parted, segments sub-equal. Shrubs with- 

 out spines. Solerochiton. 



Calyx 5-parted, segments unequal. Undershrubs, 



not spiny. Crossandra. 



D. JUSTICIEiE. 



Corolla funnel or salver shaped, imbricate. 1 



Corolla 2-labiate. 2 



1 Calyx segments 4, the two lateral ones narrower. Barleria. 



1 Calyx segments 5, sub-equal. 3 



3 Flowers in dense involucrated heads. Crabbea. 

 3 Flowers spicate or paniculate or racemose. 



Stamens 4. Asystasia. 



3 Flowers in terminal racemes. Stamens 2, fertile. Mackaya. 



2 Stamens 2, anthers 1-celled. 4 

 2 Stamens 2, anthers 2-celled. 5 



