Barleria. 



XCVIII. ACANTHACE.E (cLARKE). 



141 



described as having ovules solitary), the seed in each cell appears basal, the capsule 

 having a long empty or solid beak above it. But in most of these species the ovary 

 has 2 ovules in each cell, whereof the lower is very much smaller ; in each capsule-valve of 

 the ripe fruit a seed is in one cell, and lower down in the other cell the minute point, 

 representing the small ovule that came to nothing, is not difficult to see. 



Series A. Interpetiolar spines (i.e., reduced leaves of sterile shoots), simple or 

 pinnatifid, often present. Posticous sepal often spine-tipped or spine-toothed on 

 margin. 



*Peionitis. — Lower ovule in each cell minute or ; 

 capsule never having more than 2 seeds, ovoid with 

 conic beak. Posticous sepal usually spine-tipped, 

 rarely spine-toothed on margin, 

 f Bracts next the calyx (bracteoles) rigid spines, simple 

 or rarely with one lateral basal spiny tooth. 

 Corolla 2-lipped ; 4 posticous segments in one lip ; 

 anticous segment clawed, springing from the tube 

 lower down. 

 Corolla yellow-orange or brownish-red. 



Floral leaves elliptic or oblong, hardly imbricate. 

 Leaves glabrate. 



Spines of barren shoots |^-f in. long . 

 Spines of barren shoots often paired, up to 

 1 in. long ..... 



Leaves hairy. 



Leaves sparsely hairy ; filaments hairy 

 Leaves densely hairy beneath ; filaments 

 glabrous ...... 



Floral leaves broad, imbricate ', spikes shortly 

 substrobilate. 

 Floral leaves broadly ovate, glabrous 

 Floral leaves obovate, when young strigose 

 Corolla blue or purplish -blue. 



Corolla-tube \ in. long ..... 



Corolla-tube 1 in. long 



Corolla subequally 5-fid yellow ; tube linear, not 

 inflated upwards ...... 



ffBracts next the calyx linear, simple, green, hardly 

 spinous. 



Stem and leaves glabrous or nearly so 

 Stem and leaves hairy. 



Floral leaves minutely hairy .... 



Floral leaves plumose with long white hairs . 



fffBracts next the calyx linear spines, often with 1-2 



spinous teeth ....... 



**ACANTH0IDEA. — Ovary with 2 similar ovules in each cell ; 

 capsule (except by accident) perfecting more than 2 

 seeds. 

 tBracts next a flower simple spines (see also B. Mar- 



lothiinw^ B. Kirkii). Hairs simple, often finer 



white hairs with long tawny hairs mixed or on the 



young parts (except jB. longissima) . Flowers 



(said to be) axillary solitary — i.e., axillary racemes 



reduced to 1-flower with or without a rudiment 



of a second, verv rarely 2-flowered, 



1. B. Prionitis. 



3. B. diacantha. 



2. B. proxima. 



4. B. indutn. 



