BORAGE FAMILY 123 



or salverform corolla, stamens 5, included, inserted on the throat of the 

 corolla, ovary 4-divided, style slender or thread-like, stigma globose or 

 2-lobed, nutlets 4, or fewer, attached by their bases to the flat receptacles ; 

 flowers in leafy-bracted spikes or racemes ; leaves alternate, entire, hairy 

 or rough; annual or perennial. 



1. Corolla lobes not toothed or fringed 



a. Corolla greenish-yellow, 6-10 mm. long; throat 



nearly naked L. pilosum 



b. Corolla bright yellow to orange, 1-2 cm. long; 



throat crested 



(1) Corolla 6-8 mm. wide, bright yellow; at 



6-10000 ft. L. multifitrum 



(2) Corolla 8-20 mm. wide, orange-yellow; 



at 3-5000 ft. 



(a) Stem and leaves soft gray-hairy; corolla 



tube naked at base within L. canescens 



(b) Stem and leaves rough hairy; corolla 



tube bearded at base within L. Gmelini 



2. Corolla lobes toothed or fringed 



a. Corolla 2.5-4 cm. long; lobes fringed L. linearifolium 



b. Corolla 8-20 mm. long; lobes toothed 



(1) Corolla 8-10 mm. long L. breviflorum 



(2) Corolla 15-20 mm. long L. mandanense 



MERTENSIA Roth 1797 MERTENSIA, FORGET-ME-NOT 



(Named for Mertens, a German botanist) 



PL 21, fig. 1, 5. 



Sepals 5, united, petals 5, blue, purple or white, united into a tube-, 

 funnel- or trumpet-shaped corolla, stamens 5, inserted on the tube of the 

 corolla, included or scarcely exserted, ovary 4-divided, style thread-like, 

 fruit of 4 nutlets, wrinkled when mature and attached above their bases; 

 flowers in panicles, cymes or racemes ; leaves alternate ; perennial. 

 1. Filaments as long or longer than the anthers, 

 and as broad; stems 6 in. to 5 ft. high, at 5- 

 10000 ft. 



a. Calyx lobes oblong, obtuse, about ^-^ the 



length of the corolla tube ; stems 2-5 ft. high ; 



leaves ovate M. sibirica 



b. Calyx lobes lanceolate, acute, about ^2-^ the 



length of the corolla tube; stems .5-2 ft. 



