194 BORAGINACEAE 



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



bud. 1.5. Myosotis. 



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

 the bud. 16. Lithospermum. 



Corolla tubular, its lobes erect, acute, otherwise as in Lithosper/num. 



17. OxosMoonrM. 

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

 Pornices in the tliroat of the corolla short, blunt. 18. A\'CHUS.\. 



Fornices long, linear or lanceolate. 19. Symthytum. 



1. PECTOCARYA DC. 



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

 ending in an micinate prickle. " 1. P. linearis. 



Nutlets ol)long, their wings not lacLniate, sinuately lobed, uncinate-prickly usually 

 only at the apex, sometimes with a few prickles on the sides. 2. P. p'eniciUala. 



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. ] . C. officinale. 



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

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



4. LAPPULA (Riv.) Moench. Stickseed, Burseed, Stick-tights, 



Beggar Ticks. 



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

 pjTamidal: 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 muricate 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 tlu-oughout. 



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 pustulate 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. trachyphiilla. 

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

 Corolla tinged with blue; appendages long-liirsute. S. L. coerulescens. 

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



Marginal prickles united for one-tiiird 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. ciliala. 



Corolla wliite; pubescence liirsute. 11. L. cinerea. 



Back of the nutlets without prickles, almost smooth. 



Stem-leaves lineat -lanceolate, densely strigose. 12. L. anoustata. 



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 as the fruit. 



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

 ovate or oblong. 15. L. cenchrusoides. 



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

 leaves much reduced, lanceolate. 16. L. Fremonlii. 



Marginal prickles in one row. 



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



leaves broadly lanceolate. 17. L. calucosa. 



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

 lanceolate. 

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

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



15. L. montana 



