IBERIS 



IDAHO 



795 



1121. Iberis Gibraltarica (X K)- 



Likely to be confused with /. odorata, but the petals 

 are 4 times as long as the ealyx and the pods have short 

 hairs, while in I. odorata the petals are l}^ times aw 

 long as the calyx and the pods glabrous. 



3. odorita, Linn. Sweet-scented or Fragrant Cax- 

 0TTUFT. Lvs. linear : tls. white. Crete. S.B.F.G. 50. 

 Frequently confused with I. pinnata . Better and more 



fragrant in poor soil. 



4. pinnita, Linn. Not 

 advertised in America, 

 but often .sold as /. odu- 

 rattt. Fls. white: in- 

 florescence only slightly 

 elongatedin fruit. Spain, 

 S. France, Italy. 



5. sempSrvirens, Linn. 

 Evergreen U. Lvs. oli- 

 long, obtuse, narrowed 

 at base, gUdirous : hs. 

 white. Crete. Gng.2:14rj 

 (ftne habit sketch). F.R. 

 1:75 (poor). Var. pleno, 

 a double form, is cult., 

 but is less desirable. 

 Var. rdsea and var. fbliis 

 variegatis are sold 

 abroad. Var. sup§rba or 

 Pi.rfection is said to be 

 one of the best forms.— 

 Tills is the commonest, 

 hardiest and most per- 

 manent of the perennial 

 kinds. When the rarer 

 and tenderer kinds are 

 winter-killed /. semper- 

 virens is likely to spread 

 out and surround tltr 

 lal)els of other kinds. 

 This probably explains 

 why some of the most 



reliable dealers have sold this plant under other names, 

 particularly I. Gibr:tlfarica. 



6. saxitilis, Linn. Lvs. glabrous or ciliate: fls. white, 

 S. Eu. 



Var. corifblia, Sims ( /. corifnlia. Sweet). Lvs. gla- 

 brous: lis. white. B. M. 16-12. though this picture was 

 doubtfully referred by Baker to /. Garrexiana . 



7. Garrexiana, AIL, not Scop. Lvs. glabrous : fls. 

 white. Piedmont, Pyrenees. Referred by Index Kewen- 

 sis to /. sempervirens. Intermediate between /. sem- 

 ■pervirens and /. saxaiilis, having the habit of the latter. 



8. Gibraltarica, Linn. Fig. 1121. Lvs. wedge-shaped, 

 obtuse, subciliate : outer lis. pink, inner ones white. 

 Gibraltar. B.M. 124. Gu. 10:308. K.H. 1870:330. On. 

 24, p. 549, same as R.H. 1885, p. 440. -This is considered 

 by some as the most striking and showy of the peren- 

 nial kinds. It grows higher and more erect, with larger 

 clusters and larger Us., but is less hardy than the others. 

 This is much sought after, and the stock in the nur- 

 series is often not true to name. Var. hybrida is adver- 

 tised. 



9. umbellata, Linn. Lvs. lanceolate, acuminatr. 

 lower ones serrate, upper ones entire : fls. in the wild 

 typically purplish, rarely white : pods acutely 2-lobed. 

 Italy, Crete, Spain. B.M. 106.— This is the common an- 

 nual Candytuft with colored fls., the colors being more 

 numerous and better fixed than in any other species. 

 American trade names are vars. carminea, camea, lila- 

 cina and Dunnetti {f. DiiniteHi, Hort.), the last bein.s 

 dark purple. Vars. rosea, purpurea and alba are adver- 

 tised abroad, also vars. n4na, pumila and hybrida. Tall 

 and dwarf forms of all the colors are pnocurable. 



10. TenoreS.na, DC. Lower lvs. obovate, narrowed at 

 base: upper lvs. oblong-linear: fls. purplish or whitish : 

 pods notched at apex. Naples. B.M. 2783. L.B.C. 

 18:1721. According to Baker {G.C. 1868:711), this is the 

 only perennial kind that is decidedly hairy. DeCan- 

 dolle says the lvs. are puberulous. 



11. Prtiiti, Tineo. Lvs. glabrous, obovate-spatulate, 

 entire or subdentate : fls. white: pods merely notched 

 at apex. Sicily. Not advertised here, but cult, abroad. 



12. semp6riloren8, Linn. Lvs. wedge-shaped or spatu- 

 late, obtuse, entire, glabrous : pods scarcely notched at 

 apex. Sicily and perhaps Persia. The characters in the 

 key under D and dd distinguish this from all the other 

 species of Iberis. Once a<lvertised by Pitcher & 

 Manda, together with var. pleno, a double^variety. Var. 

 foliis variegatis said to be cult, abroad. 



I. coriiieea, QiiQQ advertised by S.MTd, is presumably a typn- 

 tivaphical error. — /. cordi folia is a frequent error for I.eorifolia. 

 — /. correafoUa, Hort., is a commoTi trade name abroad, which 

 is usually spelled I. eoiTa-folia in American catalogues. There 

 is no genus Corra, and Correa is an Austrahan plant of the 

 Rutaceje. Specimens shoiUd therefore be compared with I. s.as- 

 atilis, var. corifolia. Mottet's description, however, would plare 

 this plant directly after GaiTexiana in the key, being distin- 

 guished from Garrexiana by tlie flowers becoming purpUsh in- 

 stead of always remaining white. !Mottet says that I. correa^- 

 foUa, Hort., is a hybrid, with spatrdate, entire, obtuse lvs. This 

 qiiestiou could be quickly settled if seedsmen would keep dried 

 specimens of their plants. — /. Ibl^rica, of .John S.aul's catalogue. 

 lsy:3, is not in Index Keweusis.— 7. Ulac'ina of careless trade 

 catalogues is presumably a lilac-fld. variety of 1. umbellata.— 

 /. nana hlihrida, Hort., is not I. nana. All., a distinet ]")otani''al 

 species, but .a trade name of mixed dwarf varieties of some com- 

 mon annual kind, presumably 1. umbellata, -^ ^ jj 



ICE PLANT is Jli-Ki'mhryatillieinum crijfilalllnnin. 



IDAHO, HOKTICTILTUKE IN. Fig. 1122. The state 

 of Idaho lies entirely west of the Rocky Mountain range, 

 whose summit line forms the nortlieastern boundary. 

 All drainage and waterways of the state finally reach 

 the Columliia river by many directions and extensions 

 of numerous rivers and creeks, excepting for a small 

 area in th(> extreme southeastern iiortion <if the state, 

 which drains to the (.Ireat Salt Lake, in Utali. Generally 

 the state is very mountainous, Iiut a considerable area of 

 the southern portion constitutes the high table-lands 

 * lying on both sides of the Snake river. IMost of the 

 state lies above an altitude of 2,000 feet. At and near 

 Lewiston, in the valleys of the Snake and Clearwater 

 rivers, the altitude drops suddenly to 647 feet and up- 

 wards. The numerous mountain chains and peaks which 

 cover this vast Rocky Mountain slope, direct the streams 



1122. Idaho. 

 rate its hortieultural 

 iireas. 



in endless ways to their outlets into the large rivers. 

 Thus it can be under.stood that climatic influences are 

 extremely variable. Altitude does not altogether deter- 

 mine the" character of the climate in the valleys. The 

 prevailing currents of air in a given locality are often 

 influenced and directed by the direction of the mountain 

 ranges and the proximity of snow-clad peaks. Greater 



