BORAjQINACEAB (BQEACJE FAMILY) ^13 



prijjldes ^hich are distinct to aa obseuijemarginalfidge.-r-Erequentan Wyo- 

 ming; probably sputh ward., .u.:''. V.I,, ,■■;■ , 



Q,;L9.ppula accidentalis (Wats.) Qreene, Pitt., 4:, 97,. 1899, Pubescence 

 short, pustulate at base; steins one or more, freely branched fronj nea,E the 

 base, 1-4 dm. high: leaves hnear-oblong, mostly small, passing into small 

 bracts: flowers minute, crowded j, fruiting racemes elongated and slender: nut- 

 lets with 7-11 distinct triangular-subulate prickles generally grooved down 

 the whole inperi face, the surface of the: nutlet covered with low tuberculations 

 (not muricate). Echinospermum Bedowskii ocqideniak.lWats.-;— Frequent in 

 our range and extending both eastward and westward. ; 

 1 Jj, Lappula caiycosa Rydb, BuUl Torr. Bot. Club 28: 30. 1901. ^hirsute an- 

 nual, simple below, vifgately branched above, 3-4 dm. high: leaves, oblong, , 

 obtuse, 3-4 cm. long, smaller and bract-like on the branches: flowers and fruit 

 orishort ppdicels"' the calyx4obes enlarged, in fruit subfoliaceous and reflexed: 

 the minute cbroUa blue:, nutlets as in the preceding but the prickles not 

 grooved; backs of nutlets muricate.— <36lorddo (Rydberg and Vreeland, 1900); 



8. Lappula Lappula (L.) Karst. Deutsch. Fl. 979. 1880-83. A pale, leafy, 

 hispid-pubesCent annual, 3-6 dm. high, erect with a few erect or divaric&te 

 branches above: leaves fi'pin spatulate below to linear above, mostly obtusish: 

 racemes crowded, SDmietimes 1-sided: corolla, blue f fruit 'ovate^globular, 2-^3 

 mm. in diameter, on short stout pedicels: nutlets roiighened-papillose on the 

 back, with 2 rows of small slender prickles on'the iffiia%ins. — Naturalized from 

 Europe and to be expected within our range as a weed. 



9. Lappula cenchroides A. Nels. Bull. Torr. Bot. Club 28: 2. 1899. An- 

 nual or biennial, rather barshly pubescent, mostly intricately bushy-branched, 

 2-4 em. high: leaves numerous, obl6ng to ovate, 1-2 eni. long, the pubescence 

 on the underside with large pustulate bases: flowers minute, in leafy-bcacted 

 spikes: fruits large, nearly sessile; nutlets ovate-acute, armed, on the margins 

 with a double row of numerous large distinct unequal aculei; scabrous- 

 tub,CTCulate on the back with a,nptipe^bl6 median row. — Dry caiions; southern 

 Wyoming. 



10. Lappula cucullata A. Nels. Bot. Gaz. 34: 29. 1902. Pubescence short, 

 sjibcinereous, scarqely hispid, more or less branched from the^ crown of the 

 slender taproot, 1 (rarely 2) dm. high: leaves numerous, , nalrowly oblong, 

 1-3 cm. long, passing into' the smaller foUar bracts: flojKers linconspipuqus: ' 

 fruits l^rge tfor the plapt; nutlets similar, all deeply cupulate or hooded, the 

 border, thin but strongly involute, the tonnded margin, bearing a few short, i 

 glochidiate ■pric)des;.;the tip of the nutlet, with .nearly an equa^iUjUtiibpr of, 

 slender prickles not involved in the border of , the hood] (these .chaxacters not 

 fullj[ developed till maturity) ; the bqdy of the nutlet with a dorsal, slightly 

 muriculate ridge, ventrally orbicular with an abrupt acumination, , strongly 

 keeled, the sides closely muriculate.-^^andy barrens ; Wyoming. and southward. ■ 



11. Lappula foliosa A. Nels. !, Diffusely and, profusely brancljfld ffbm.th^, 

 base, the slender branches very leafy throughout, 10-20 cm. long, floriferous 

 nearly to the base but more remotely so downward: leaves broadly linear, 

 1-3 cm. long: flowers blue: fruits'on snOrb pedicfelS which tend to recurve; nut- 

 lets all.afike, the prickles widely dilated and connected at bascj forming a 

 narrow jkijing-like revolute margin, minutely papillose-scabrous, on all sides 

 with a'nqticeable dorsal ridge. L. deseriorum foliosa A.' Nels. Bull. Torr 

 Bot. Club '27: 267. 1900.— Red Desert of Wyoming; probably Southward. . 



12. Lappula heterospeima Greene, Pitt. 4: 94; 1899. Diffusely branched, 

 often nearly to the base; the branches 10-15 cm. long, loosely floriferous, each 

 flower subtended by a leafy bract which sin-passes even th'e mature fruit: 

 leaves linear to oblong-linear, subcinereous: flowers pale blue: nutlets dis- 

 similar, 3 "with an elevated, coroniform, thickened, aculeate border, the fourth 

 with about 6 prickles almost distinct, but each dilated and slightly inflated at 

 base, a line of sharp murication forming a dorSal ridge ftnd the whole surface 

 of nutlets minutely muricsite, even on the cupulate crown. — Southwestern 

 Colorado and southward as to the species. The following variety occurs 

 farther northward. ■:<■.■-• . ,1, 



