1000 BORR AGIN ACE AE 



5-10 mm. long : corollas of 2 kinds, the earlier of a bright yellow color, with tube 2.5-3 

 cm. long, crested in the throat and rounded lacerate lobes, the later form not surpassing 

 the calyx, pale-yellow : nutlets oblong-ovoid, 3-4 mm. long, keeled, sparingly pitted. 



In dry soil, often on prairies, Manitoba to British Columbia, Illinois, Texas and Arizona. Spring 

 and summer. 



9. Lithospermum Mandan6nse Spreng. Perennial, strigose. Stems tufted, typically 

 less than 2 dm. tall, commonly simple : leaf-blades linear or nearly so, 2-5 cm. long : corol- 

 liferous flowers clustered : corolla yellow ; tube about 1.5 cm. long ; limb over 1 cm. wide, 

 the lobes erose : nutlets ovoid, about 3 mm. long. 



On plains and in woods, Alberta to Texas and Arizona. Spring and summer. 



10. Lithospermum breviflorum Engelm. & Gray. Perennial, strigose, similar to 

 L. Mandanense in habit but often more slender and taller. Stems tufted, typically over 

 2 dm. tall, commonly branched : leaf-blades narrowly linear, 1.5-4 cm. long : corolliferous 

 flowers clustered : corolla yellow ; tube about 1 cm. long ; limb less than 1 cm. wide, the 

 lobes erose : nutlets 3.5-4 mm. long, strongly keeled. 



On plains and prairies, Colorado to Texas. Spring and summer. 



7. ONOSMODIUM Michx. 1 



Perennial coarse caulescent herbs, with pubescent foliage. Leaves alternate : blades 

 prominently nerved. Flowers in terminal scorpioid spikes or racemes. Calyx pubescent : 

 lobes 5, narrow. Corolla white, greenish or yellowish, tubular or tubular-funnelform, the 

 tube surpassing the calyx, without appendages, but with the sinuses often inflexed, and 

 a 10-lobed band within near the base : lobes 5, often erect. Stamens 5, included : anthers 

 almost sessile, glabrous, the lobes diverging. Ovary of 4 slightly united carpels. Nutlets 

 4, or usually only 1 or 2 maturing, white, smooth and shiny or sparingly pitted, attached 

 to the receptacle by their bases. FALSE GROMWELL. 



Bracts broad, of an ovate type, rounded at the base. 1. O. Hclleri. 



Bracts narrow, tapering at the base. 

 Corolla-lobes triangular-ovate. 



Stem below the branches of the inflorescence more or less hairy. 



Nutlets strongly constricted at the base. 2. 0. C'arolinianum. 



Nutlets not constricted at the base. 



Corolla-lobes long-acuminate. 3. O. Bejariente. 



Corolla-lobes meiely acute. 4. 0. mollc. 



Stem below the branches of the inflorescence glabrous. 5. O. zubsetomm. 



Corolla-lobes lanceolate-subulate. 6. 0. Virginianum. 



1. Onosmodium H611eri Small. Rootstock horizontal. Foliage hispid : stems 3-6 

 dm. tall, simple or sparingly branched above : leaves rather few ; blades oblong or spatu- 

 late-oblong below to ovate above, 5-10 cm. long, obtuse, undulate, hispid above, rather 

 more softly pubescent beneath, subsessile or the lower narrowed into short petioles : 

 racemes leafy-bracted ; rachis zigzag : pedicels erect or strongly ascending, 1-1.5 cm. long, 

 with spreading hairs : calyx bristly ; lobes linear or barely enlarged upward, 8-10 mm. 

 long : corolla 8-10 mm. long ; lobes lanceolate : nutlets 3 mm. long, pitted. 



On prairies or plains, Texas. Spring. 



2. Onosmodium Carolinianum (Lam.) A. DC. Foliage hispid. Stems 5-12 dm. 

 tall, branching above : leaves numerous ; blades oblong to oblong- or linear-lanceolate, 

 3-12 cm. long, acute, hispid on both sides, sessile or nearly so: racemes leafy-bracted : 

 pedicels 4 mm. long or less : calyx somewhat bristly ; lobes linear, obtusish,' 4-6 mm. long : 

 corolla yellowish white, 8-16 mm. long ; tube funnelform ; lobes triangular-ovate, acute, 

 little canescent without but with a strongly developed apical tuft of hairs : nutlets ovoid, 

 2 mm. or 4 mm. long, acutish, smooth or sparingly pitted. 



In dry soil, Ontario to Minnesota, Georgia and Texas. Spring to fall. 



3. Onosmodium Bejartense DC. Foliage hispid. Stems 3-9 dm. tall, simple or 

 sparingly branched above : leaves rather numerous ; blades oblong or oblong-oblanceolate, 

 3-12 cm. long, apiculate or acutish, hirsute-strigose above, more softly pubescent and 

 usually noticeably paler beneath, sessile or nearly so : pedicels 6 mm. long or less or calyx 

 sessile ; lobes linear, erect, 6-10 mm. long : corolla whitish ; tube funnelform, 10-15 mm. 

 long ; lobes triangular-ovate, long-acuminate, about as long as the tube, sparingly 

 pubescent without : nutlets 1.5-3 mm. long, minutely pitted. 



In dry soil, Texas. Spring. 



4. Onosmodium molle Michx. Foliage strigose or hispid-strigose. Stems 2-8 dm. 

 tall, sparingly branched above : leaves numerous ; blades oblong or elliptic-lanceolate to 

 linear-oblong, 2-6 cm. long, acute or obtusish, prominently nerved beneath, densely stri- 



1 Revised bv Mr. K. K. Mackenzie. 



