IRIS 



steadily becoming warm, tlie plants beinx uncovered as 

 soon as tbe conditions will seem to warrant, should be 

 in the best possible shape to reward one with their noble 

 blooms. It is the lack of this srenial sprins in the lati- 

 tude of New York which, h.nvpv.r. li-:i.ls often to cul- 

 tural troubles. The leaves. \<:,\ ):,_■ I- . :, i.i .itucted, are 

 none too hard, and, with thr . iite thawing 



and freezing, and the hif.'h ' : M cold, the 



plants need constant watch i ml' :Mii :L;>[hp :ti I'li (jf needed 

 covering till really genial weather. Otlierwise the foli- 

 age is blighted and no flowers are produced. 



In gardens which are low and never free from mois- 

 ture, the best procedure is that followed in Holland, 

 lifting tlie rhizomes in .Julv and taking them undercover 

 in drv earth, planting out again in the fall. In this case 



823 



be 



Hesb 



The P.- 



ian fi. 



of 



tdiffic 



Irises an , : ^. ;ised by the division of the 



rhizomes .u i ; it maybe rapidly grown from 



seed, wliirli iln \ ii-i;ili\ produce freely, though, in 

 most cases, they requii-e artificial fertilization. .V large 

 number of the common Irises of gir.l.ns aiv h^ll^hls, 

 and of late years a number of beautiful livlni.ls have 



been produced between some of the ranr (in yc'lus 



species, and between these also and common forms, as 

 /. variegalfi, etc. There are still opportunities to pro- 

 duce many new and untried crosses, and experiments 

 in this line are recommended. The pollination of the 

 Iris is simple. The anthers should be removed when 

 the flower first opens, and preserved in paper or vials, 

 properly marked. The pollen will retain its potency for 

 a week or perhaps longer, and may be applied to the 

 stigma of the flower selected (the anther of which has 

 been removed promptly) with a camel's-hair brush. 

 The stigma will be found near the apex of the petal-like 

 style, and is ready for pollination when the upper edge 

 drops down and exposes the upper surface. Many Iris 

 seeds germinate with considerable irregularity, and 

 failure to start promptly should not lead to discourage- 

 ment or discarding of the pan in which the seeds are. 

 J. N. Gerard. 



azurea. 37. 

 Bakeriana. 90. 

 Balkana. 40. 

 Benaeensis, j>2. 

 bitlora. 41. 



Florenti 

 fcetidissi 



fragrans 

 fiUva, 17 



Germaniea. 6 

 gigantea. 26. 

 gracilis, 10. 8 



Gypsea. 60. 

 hcpmatophiiUa. 

 halophtilla. 30. 



lurida. 51. 70. 

 Lusitanica. 81 

 lutescens, 44. 



.55. 



auperba, 13. mga, 67. 



Smdjarensis, 97. Susiana, 77. variegata. 12, 18, 48. 



!<isyrinchium, 92. Suwarowi, 66. Vartani. S9. 



Soijdiana. 23. Swertii, 57. verna. 31. 



speciosa, 55. tectorum, 33. versicolor. 19. 



spectabilis, 81. tenax. 8. i;ialac,n. OS. 



spuria, 30. Tingit.ana, 83. viresi'i-ns. 4:1. 



squalens, 61. Tohnieana, 15. riniiiiirn. lo. 



Statellw. 44. Trojana. 29. xiplii<.i.l.:s. s2. 



stylosa, 13. unguicularis. 13. Xiphium. SI. 



Syxopsis of Subgen-era ix Cultivation. 



Series I. Rootstock a short, thick, or creeping 



rhizome. 



Apooos. Outer segments of the perianth without 



a beard or crest Species 1-30 



Pardanthopsis. Outer segments of the perianth 

 not distinctly bearded or crested, merely keeled; 

 sometimes slightly hairy Species 31 



EvANSiA. Outer segments of the perianth dis- 

 tinctly crested on the claw and lower part of 

 the blade Species 32-35 



PsEUDE VANSiA. Outer segments bearded or hairy : 



beard springing from a rudimentary crest 



Species 36 



PoooNiRis AND Regelia. Outer segments bearded 

 or hairy: hair restricted to a dense beard along 

 the midrib Species 37-68 



Oncocvclus. Outer segments bearded or hairy: 

 hairs diffused over the lower part of the blade 

 and claw; inner segments larger than the outer. 

 Species 69-80 



Series II. Rootstock bulbous. 



XiPHiON. Inner segments of the perianth large, 

 erect : stamens not adhering to the style 

 branches Species 81-91 



Gtnajjdiris. Inner segments large, erect: sta- 

 mens adhering to the style branches Species 92 



JtTNO. Inner segments small and spreading or 

 deflexed Species 93-102 



SCBGESUS APOGON 



A. Lvs. linear, generally less than 



fibers. 



[*. Valves of the apatheqr 



D. Tube of the peri' 



1%-i in. lonq. 



E. ^>(^7(e sessile.. 



EE. Spathe stalked . 



DD. Tube of the peril 



short or obsolete. 



E. Fls. yellow 



xhinh' 



coendea, 87, 102. 

 concolor. 68. 

 cristata, 32. 



Danforili: 

 Delavayi. 

 Douglasis 



Hiaigarica, I 

 hybrida. 59. 

 Iberica, 76. 



Jacqitesiana, 

 Japonica. 35. 

 juncea, 85. 

 Junonia, 55. 



longipetala. 9. 



pur in 



,94. 



, 87. 



Rnseiibachiana. 95. 

 Ruthenica, 1, 5. 

 sambucina, 62. 

 sanauinea, 12. 

 Sarii, 70, 79. 

 scorpioides, 99. 

 setosa, 22. 

 Sibirica, 12. 



enrpiiiii . . C. tenax 



7. ensata 



8. Delavayi 

 GG. Ste m c o m - 



pressed 9. longipetala 



PF. Stem Ivs. long, 

 generally orer 1 



ft. in length 10. prismatica 



11. grraminea 

 cc. Valves of the spathe brown 



and scarious 12. Sibirica 



BB. Sheaths not splitting into 

 fibers. 



c. Stem nearly obsolete 1.3. unguicularis 



cc. Stem present, clothed uith 



sheathing bracts 14. bracteata 



