BORAGINACE.E 475 



II Ovary 4-parted ( rarely 2-parted ) from above into 1 -celled 

 1-ovuled divisions surrounding the style. Stigma not annular, 

 terminal. Nutlets attached to a central depressed or elevated 

 disk receptacle or axis called the gynobase. 



TRIBE in Mostly herbs with entire leaves. Flowers chiefly- 

 near but not in the axils of bracts or leaves or bractless, in scorpi- 

 oid spikes or racemes. 



* Corolla and stamens regular : style entire or sometimes barely 

 2-cleft at the apex. 



*- Ovary 4-parted or 4 lobed : fruit of 4 nutlets or by abortion fewer, 

 subtended or surrounded by the unchanged or merely accrescent calyx. 

 = Nutlets divergent or divaricate. 



3 Pectocarya Small annuals with minute white flowers : nutlets flat and 



thin, attached at the inner end underneath to a small depressed 

 gynobase. 



4 Cynoglossum Stout perennial or biennial herbs with blue flowers in 



bractless racemes : nutlets equally divergent, horizontal or obliquely 

 ascending on a depressed or pyramidal gynobase. 



** ** Nutlets erect and parallel with the style or sometimes incurved. 



= Nutlets attached obliquely by more or less of the ventral face or 

 angle or by ihe base or prolongation of it to the more or lees elevated 

 gynobase, not stipitate and the scar not excavated. 



a Nutlets armed with glochidiate prickles, forming burs. 



5 Lappula Annual or perennial herbs: corolla short-salverform or some- 



what funnelform, blue or white; the throat closed with prominent 

 fornicate appendages. 



b Nutlets very variable, from nearly smooth to glochidiate. 



6 Eritrichinm Nutlets obliquely ascending, with depressed or truncate- 



complanate back bordered by an acute margin or at length revolute, 

 entire or dentate or spinulose wing. 



7 Allocarya Mostly annuals with opposite leaves and white flowers : 



pedicels turbinate-thickened and more or less 5-angled, persistent: 

 coroJla salverform. 



c Nutlets unarmed. 



8 Piptocalyx Small annuals with alternate or scattered leaves and small 

 white flowers on very short persistent pedicels : calyx cireumscissile 

 near the middle, the upper part soon falling away: nutlets straight, 

 attached for nearly their whole length to a subulate gynobase. 



9 Eremocarya Hirsute-canescent small annuals with most of the leaves 



in a radical tuft and small white flowers on persistent pedicels in gem- 

 inate racemes ; the root giving a deep purple stain. 



10 Plagiobothrys Annual herbs with most of the leaves in rosulate 

 radical tufts and small flowers 6n slender persistent pedicels : nutlets 

 more or less incurved, attached in the middle of the concave ventral 

 face to a globular gynobase. 



11 Oreocarya Stout perennial or biennial herbs with scattered leaves 

 and comparatively large flowers on filiform persistent pedicels: nutlets 

 attached by the inner angle to a slender gynobase. 



