62 BOSACKJB. 



16. SIBALBIA, LinnmuB. 

 I. S. procumbens, L. Stems creeping: calyx lobes exceeding the minute pct»l<. 



16. HORKELIA, C. & S. 



Styles thickened at the base : leaflets incised 6-12 lines long. 1 



Calyx-bracts nearly as broad aathelobes:! eaflets 3-S lines long ,2 



Calyx-bracts much narrower than the lobes. 



Leaflets deeply incised or lobed 3, 4, 5, 6 



Leaflets few-toothed at the truncate apex 7 



Leaflets bifid, 2 or 3 lines long, silky 8 



1. H. fusca, Lindl. Cymes dense: petals 2 lines long, sepals longer. 



2. H. Califomica, C. & S. Glandular: sepals and petals 3-6 lines long. 



Var. sericea, Gr. Stouter: leaflets larger: canescent with silky hairs. ' 



8. H. congesta. Hook. Sparsely stiflf-hairy: leaflets 6-9 lines long. 



i. H. teziuiloba, Gr. White-hairy: leaflets S-12 pairs, 2-3 lines long. 



5. H. Bolanderi, Gr. Densely hoary, pubescent, tufted, 3-4 inches high. 



6. H. purpurascens, Watson. Purplish calyx 3-4 lines long: petals rose-colu». 



7. H. tridentata, Torr. Silky: leaflets 2-5 pairs, mostly 3-toothed at apex. 



8. H. sericata, Watson. Tufted: some stem leaflets entire: petals notched. 



17. rSTESLA., Torrey S; Gray. 



Flowers in rather close panicled cymes: stems mostly leafy 1, 2, 3 



Flowers yellow, in cymes on nearly naked stems. Alpine 4, 5 



Flowers white, in diffuse panicles upon leafy stems 6 



1. I. Pickeringii, Torr. Densely white-silky: petals yellowish, spatulate. 



2. I. unguiculata, Gr. Similar: petals white, clawed, orbicular: carpels 5-8. 



3. I. Webberi, Gr. Low, loosely villous: petals yellow: stamens 5-10. 



4. I. Gordoni, T. & G. Viscid: 3-10 inches high: stem leaves pinnatifid. 

 Var. pygmaea, Watson. An inch or two high: stamens sometimes 10. 



Var. lycopsoides, Watson. Nearly glabrous: leaflets thick, rounded, imbricated. 



5. I. Muirii, Gr. Densely silky, an inch high: leaves terete: carpels 2. 



€. I. santalinoides, Gr. Stems 6-18 inches high: leaves silky: terete: carpel 1. 



18. ADENOSTOMA. H. & A. 



1. A. fasciculatxizn, H. & A. Bark becoming shreddy: leaves subulate, aoate. 



2. A. sparsifolium., Torr. Kesinous: leaves scattered, obtnse. San Diego, 



19. AliCHEMILLA, Toumefort. 

 I, A- arvensis, Scopoli. Ad obscure under-herb: stipules enclosing the Cower*. 



