IBERIS 



Likely to be confu ed with / odorata hut the petals 

 are i times "i'» lung as the calyi. and the pods have short 

 hau whil m 7 odorata the petals are IK times as 

 lon„ I lUe L ihx ind the pods glabrous 



i odorita Liiin Sweet scented or Fragrant Can- 

 DiTiFr L\ h leii fls white Crete S B.F.G. 50. 

 Frequeutlj utu 1 with / /)iHHa^« Better and more 

 fragrant m poor soil. 



4 pmnilta Linn. Not 

 advertised m America, 

 but often sold as /. odo- 



I rata Pis white: in- 

 ' , florescence only slightly 

 / elon.,atedin fruit. Spain, 

 ' S Fnnce Italy. 



5 sempfirvirens, Linn. 



' E\EE( RbEN C. LVS. Olj- 



f *:^ long obtuse narrowed 

 ij\"> at bise glabrous : fls. 

 white Crete Gng. 2:145 

 (fine habit sketch). F.R. 

 1 7o (poor) Var. pidno, 

 a double form, is cult., 

 but IS less desirable. 

 Var rosea and var. fdliis 

 variegatis are sold 

 abroad \ ar Bup6rba or 

 Perfection is said to be 

 one of the best forms.— 

 This is the commonest, 

 hardiest and most per- 

 manent of the perennial 

 kinds When the rarer 

 and tenderer kinds are 

 w inter killed /. semper- 

 tirens is likely to spread 

 out and surround the 

 labels of other kinds. 

 yi). This probably explains 

 why some of the most 



reliable dealers have sold this plant under other names, 



particularly /. Gibraltarica. 

 6. sax4tilis, Linn. Lvs. glabrous or ciliate: fls. white. 



Var. corlfdlia, Sims (/. corifUia, Sweet). Lvs. gl; 

 brous: fls. white. B. M. 1642, though this picture wi 

 doubtfully referred by Baker to /. Garrextana. 



7. Garrexiana, All., not Scop. Lvs. glabrous : fl 

 whiti-. l'iiaia..ut, Pyrenees. RefeiTe.l by Index Kewei 



IDAHO 



795 



1121. Iberis Gibralt: 



Int. 



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

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

 Gibraltar. B.M. 124. Gn. 10:308. K.H. 1870:330. Un. 

 24, p. 549, same as R.H. 1885, p. 446. — 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 fls., but is less hardy than the others. 

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

 series is often not true to name. Var. h^brida is adver- 

 tised. 



9. umbellita, Linn. Lvs. lanceolate, acuminate, 

 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, c4rnea, lila- 

 cina and Diinnetti (/. Dunnettl, Hort.), the last being 

 dark purple. Vars. rdsea, purpiirea and 41ba are adver- 

 tised abroad, also vars. nknn, ptimila and hjbrida. Tall 

 and dwarf forms of all the colors are pnocurable. 



10. Tenoreina, 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. Prtliti, Tineo. Lvs. glabrous, obovate-spatulate, 

 entire or subdentate : fls. white: pods merely notched 

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



12. sempirflorens, 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 advertised by Pitcher & 

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

 foliis variegatis said to be cult, abroad. 



I. cariicea. once advertised by Saul, is presumably a typo- 

 graphical error.— /. cordifblia is a frequent error for I. corifolia. 

 —I.corretefdlia, Hort., is a common trade name abroad, which 

 is usually spelled 1. corrsefolia in American catalogues. There 

 is no genus Corra, and Correa is au AustraUan plant of the 

 RutacesB. Specimens should therefore be compared with I. sax- 

 atiUs, var. corifolia. Mottet's description, however, would place 

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

 guished from Garrexiana by the flowers becoming purplish in- 

 stead of always remaining white. Mottet says that X. correas- 

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

 question could be quickly settled if seedsmen would keep dried 

 specimens of their plants. — 7. Ibtirica, of Joiin Saul's catalogue, 

 1893, is not in Index Kewensis.— 7. lilachia of careless trade 

 catalogues is presumably a lilac-tld. variety of I.umbellata.— 

 7. nana hdbrida, Hort., is not I. nana. All., a distinct botanical 

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

 mon annual kind, presumably 1. umbeUata. ■^y^ j\j^ 



ICE PLANT is MesemhrijanOiemum crystallinum. 



IDAHO, HOETICULTUKE IN. Fig. 1122. The state 

 of Idaho lies entirely west of the Rocky Mountain range, 

 whose summit line forms the northeastern boundary. 

 All drainage and waterways of the state finally reach 

 the Columbia river by many directions and extensions 

 of numerous rivers and creeks, excepting for a small 

 area in the extreme southeastern portion of the state, 

 which drains to the Cireat Salt Lake, in Utah. Generally 

 the state is very mountainous, but a considerable area of 

 the southern portion constitutes the high table-lands 

 lying on both sides of the Snake river. Most 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 047 feet aud up- 

 wards. The numerous mountain chains and peaks which 

 cover this vast Rocky Mountain slope, direct the streams 



1'22. Idaho, 

 dlustrite its horticultural 



in endless ways to their outlets into the large rivers. 

 Thus it can be understood 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 



