BORAGINACBAE (bOBAGE ?AMI];.y) 411 



Biennials or perennials. 



Nutlets pnckly on the margin 5. Eritrichium. 



Nutlets not prickly on the margin. 



Flowers white or yellow 8. Oreocarya. 



Flowers blue (rarely white) 9. Mertensia. 



Nutlets attaiihed by their bases. 



Nutlets small, smooth and membranous; flowers blue, in 



br^ctless racemes . . . * . . , . ,10. Myosotis. 

 Nutlets bony and polished; flowers yellow, in leafy or 



bracteate racemes; corolla^lobes rounded, spreading . . II. Lithospernium. 

 Nutlets smooth, subglobose; flowers greenish or yellowish, 



in leafy-practeate racemes; corolla-lobes acute, erecV ,' 12. Onosinodium. 



1. COLDENIA L. 



Low herbaceous or suffrutescent plants, with canescent or hispid entire 

 leaves, and small, white, clustered, sessile flowers. Galyx 5-parted. Corolla 

 funnelform or salverfonn and convolute. Fruit separating at maturity into 

 four 1-aeeded nutlets. 



: 1. Coldenia Nuttallii Hook. Kew Jpum. Bot. 3: 296. 1851. Prostrate 

 annual, repeatedly and divergently diohotomous: Ipaves ovate or rhomboid- 

 rotund, 4-10 mm., long, on longer petioles, with 2 or 3 pairs of strong and 

 spmewl^a.t' curving veins, and margins .somewhat revolute: flowers densely 

 clustered in the forks and at the ends of the naked branches: filaments in- 

 serted nearly in the throat of the pink, or whitish corolla, the tube of which 

 bears 5, short obtuse scales near the base: nutlets marked with a Unear and 

 raphe-like ventral scar. — ^Dry plains; from Wyoming to New Mexico and 

 westward. 



2. HELIOTROPIUM L. Heliotrope 



Annuals or perennials; ours herbaceous and with alternate, entire leaves, 

 white (flowers, .deeply 5-parted , persistent calyx, salverfonn or funiielform 

 corolla, sinuses more or less plaited in bud, connivent anthers, and a 4-celled 

 ovary becoming a 2 or 4-lobed fruit splitting in^o ,1-seeded nutlets. 



Glabrous and glaucous; fruit 4-lobed . . . . . .,1. H. spathulatum. 



Strigose-canescent; fruit 2-lobed ;' 2. H. convolvulaceum. 



1. HeliotTopium spathulatum Rydb. Bull. Torr. Bot. Club 30: 262. 1903. 

 Diffusely spreading perennial, 1-3- dm.; high: leaves succulent, obla,nceplate 

 or narrower: spikes unilateral, scorpioid, mostly in pairs or twice forked, 

 densely flowered: corolla 6-8 mm. broad, white, with a yellow eye: stigma 

 sessile,, disk-shaped, as broad as the glabrous ovary: nutlets scarcely rugose. 

 H. curassavicum L. in part. — In moist strongly saline soils; throughout our 

 range. 



2. HeUotropiuin convolvulaceum (Nutt.) Gray, Mem. Am. Acad. 6: 403.. 

 1857. A, low, spreading, freely branched annual, 1-3 dm. high: leaves pvate 

 to nearly linear, short-petioled: flowers solitai]y, opposite the leave's and ter- 

 minal, diortTpeduneled: calyx-segmesnts acuminate: corolla large, strigpse.on 

 the tube, which ex^eds the^ sepals and the angulate-lobed ample limb: an- 

 thers cohering slightly by their minutely bearded tips: style long and filifijrm; 

 stigma conical, with a truncate, peniciUate tip. — Sa^dy plains; Colprado and 

 westward. .i .,, 



3. LAPPULA MPench. Sticksebd 



Hispid-pubescent or canescent herbs, with alternate entire leaves, and sinaH 

 white or blue flowers in. spikes or racemps. Calyx 5-cleft. Corolla salverform 

 or funnel-form, with short tube and the.^lobes imbricated in bud. Stamens 

 included. Ovary 4-lobed, becoming a bur-like fruit of 4 nutlets armed with 

 barbed prickles. — Eckinosp^nnum Sw. 



Racemes ebracteate above; fruiting pedicels deflexed. 

 Annual; flowers small; racenies open ..•••• 1. L. americana. 



Biennial; flowers medium; raceme dense 2. L. floribunda. 



Perennial., 



