194 BORAGINACEAE 



Racemes not bracted; corolla in ours blue, its lobes convolute in the 

 bud. 15. MTOSOTIS. 



Racemes bracted; corolla yellow or yellowisli, its lobes imbricated in 

 the bud. 16. Lithospermum. 



Corolla tubular, its lobes erect, acute, otherwise as in Lithospermum,. 



17. ONOSMOOniM. 



Scar of the nutlets large and excavated, bordered by a prominent margin. 

 Fornices in the throat of the corolla short, blunt. 18. Anchusa. 



Fornlces long, Unear or lanceolate. 19. Stmi'HYTOM. 



1. PECTOCARYA DC. 



Nutlets linear or Unear-oblong, their wings pectinately or laciniately toothed, each tooth 

 ending in an uncinate prickle. 1. P. linearis. 



Nutlets oblong, their wings not laciniate, sinuately lobed, uncinate-prickly usually 

 only at the apex, sometimes with a few prickles on the sides. 2. P. penicillala. 



2. GRUVELIA A. DC. l. G. setosa. 



3. CYNOGLOSSUM (Tourn.) L. Hound's Tongue. 



Soft pubescent; lower leaf-blades oblong or spatulate; stem-leaves lanceolate; inflores- 

 cence many-flowered and leafy. 1 . C. officinale. 



Hispidulous; lower leaf-blades oval; stem-leaves oblong-ovate, clasping; inflorescence 

 few-flowered and naked. 2. C. boreale. 



4. LAFPULA (Riv.) Moench. Stickseed, Bursbed, Stick-tights, 



Beggar Ticks. 

 Inflorescence leafy-bracted only at the base; bracts minute above; gynobase short- 

 pyramidal; scar of the nutlets ovate or triangular; perennials or biennials. 

 Marginal prickles free to the base or nearly so. 

 Corolla 1.5-3 mm. wide. 



Leaves thin; stem-leaves lanceolate. 



Fruit about 3 mm. wide; nutlets usually with a few prickles on the back. 



1. L. americana. 

 Fruit about 5 mm. wide; nutlets merely min-icate on the back. 



2. L. leptophylla. 

 Leaves firmer; stem-leaves oblanceolate to linear; fruit about 3 mm. wide. 



not prickly on the back. 3. L. Besseyi. 



Corolla 4-12 mm. wide; leaves firmer. 



Fornices of the corolla glabrous or papillose. 

 Fornices broader than long; corolla blue. 



Foliage rather softly pubescent; stem leafy throughout. 



Corolla 4—6 mm. broad; nutlets without prickles on the back. 



4. L. floribunda. 

 Corolla 8-10 mm. broad ; nutlets with a few prickles on the back. 



5. L. diffusa. 

 Foliage hirsute; hairs with pustuiate bases; stem very leafy at the base. 



few-leaved above. 6. L. gracilenta. 



Fornices as long as broad; corolla white; foliage harshly papillose-scabrous. 



7. L. trachyphylla. 

 Fornices of the corolla pubescent; nutlets with about 10 prickles on the back. 

 Corolla tinned with blue; appendages long-hirsute. 8. L. coerulescens. 

 Corolla white; appendages pilose. 9. L. subdecumbens. 



Marginal prickles united for one-third to one-half their length into a distinct wing. 

 Back of the nutlets strongly muricate and with prickles. 



Corolla blue; pubescence fine, appressed. 10. L. ciliata. 



Corolla white: pubescence hirsute. 11. L. cinerea. 



Back of the nutlets without prickles, almost smooth. 



Stem-leaves lineai -lanceolate, densely strigose. 12. L. angustata. 



Stem-leaves oblong-lanceolate, hispidulous, the hairs with papillose bases. 



13. L. scaberrima. 

 Inflorescence leafy, the floral leaves, although smaller, resembling those of the stem; 



annuals. 

 The annular margin connecting the bases of the prickles inconspicuous in all four 



nutlets. 

 Marginal prickles in two rows. 



Corolla almost 3 mm. wide; prickles shorter than the length of the fruit. 



14. L. erecta. 

 Corolla less than 2 mm. wide; prickles nearly as long zis the fruit. 



Fruit 4-5 mm. long; sepals ovate-lanceolate, obtuse; floral leaves ample, 

 ovate or oblong. 15. L. <enchrusoides. 



Fruit 3-4 mm. long; sepals lanceolate or linear-lanceolate, acute; floral 

 leaves much reduced, lanceolate. 16. i. Fremontii. 



Marginal prickles in one row. 



Calyx-lobes more than twice as long as the fruit, reflexed-spreading; floral 



leaves broadly lanceolate. 17. L. calycosa. 



Calyx-lobes less than twice as long as the fruit; floral leaves linear or linear- 

 lanceolate. 

 Dorsal faces of the nutlets inside the annular manjin small ; lower prickles 

 inserted about one-third the distance from the base; stem strigose. 



18. L. montana 



