IRIS 



IRIS 



1669 



BBB. Outer segms. of the perianth without a beard or 



crest, sometimes pubescent, 

 c. Infl. a regular raceme: seeds conspicuously 



winged PARDANTHOPSIS. Species 52 



cc. Infl. not a regular raceme: seeds not conspicu- 

 ously winged APOGON. Species 53-85 



AA. Rootstock a bulb. 



B. Inner segms. of the perianth small, often minute, 



spreading or deflexed JUNO. Species 86-98 



BB. Inner segms. of the perianth large, erect. 



c. Stamens not adhering to the style-branches. 



XIPHIUM. Species 99-109 



cc. Stamens adhering to the style-branches 



GYNANDRIRIS. Species 110 



SUBGENUS EVANSIA. 



A. St. none or very short, evidently exceeded 



by the Ivs.: plants dwarf. 

 B. Perianth-tube very slender, exceed- 

 ing the bracts 1. cristata 



BB. Perianth-tube expanded above, not 



exceeding the bracts 2. lacustris 



AA. St. evident, equaling or exceeding the 



Ivs.: plants large. 

 B. Pedicel much shorter than the 



spathe 3. tectorum 



BB. Pedicel about as long as the spathe 



or only slightly shorter. 

 c. Lvs. thin, distinctly ribbed, both 



surfaces slightly glaucous 4. Milesii 



cc. Lvs. thick, smooth, with a glossy 

 upper- and a glaucous under- 

 surface 5. japonica 



1. cristata, Soland. Plant dwarf: rhizome slender, 

 creeping: Ivs. ensiform, thin, 4-8 in. long, green: st. 

 1-3 in. high, flattened, 1 -headed, bearing 2-3 Ivs. : tube 

 slender, 1^4-2 in. long; limb blue; outer segms. obo- 

 vate, 1-1 H in. long, crested; inner segms. shorter, 

 naked. April, May. Mountains of Ky., Va., and the 

 Carolinas. B.M. 412. Gn. 45, p. 127. L.B.C. 14: 

 1366. 



2. lacustris, Nutt. Similar to 7. cristata in size and 

 foliage except that the Ivs. are rather narrower and 

 sometimes wavy margined 



and the perianth-tube is 

 only )^-l in. long, shorter 

 than the spathe -valves: 

 fls. blue; segms. expanded 

 above: caps, ovoid, borne 

 on a pedicel of about its own 

 length. Shores of Lakes 

 Huron, Michigan, and Su- 

 perior. 



3. tectorum, Maxim. (/. 

 chinensis, Bunge. 7. cris- 

 tata, Miq. 7. fimbriata, 

 Klatt). Fig. 1965. Lvs. 1ft. 

 long, ensiform, thin, strongly 

 ribbed: st. 1}^ ft., sub terete: 

 heads on long peduncles; 

 tube 1 in. long; limb bright 

 lilac; outer segms. 2 in. 

 long, obovate; claw half as 

 long as the blade, streaked 

 with violet, with a wavy 

 edge and a large, laciniate, 

 white and lilac crest running 

 up the claw and half up the 

 blade; inner segms. spread- 

 ing, nearly as large, plain 

 lilac, short-clawed. Sent to 



Eu. in 1872 by Dr. Hance. Cult, in China and Japan. 

 B.M. 6118. F.S. 22:2282. Gt.716. Gn. 50:272. G.C. 

 III. 35:355; 44:142. J.H. III. 44:146. G.L. 17:348. 

 Var. alba, Dykes (7. tectorum var. Candida, Hort.). Fls. 

 pure white, with few faint yellow veins at the base of 



1965. Iris tectorum. ( X %) 



the segms. Comes true from seed. Gt. 57: 1571. Gn. 

 70, p. 15. G.C. III. 40:216. G.W. 10:525. 



4. Milesii, Foster. Lvs. 7-8 on the st. 2-3 ft. long 

 and 2-3 in. broad, thin, strongly ribbed: st. 2-3 ft. 

 high, branched, bearing 4-5 heads: fls. bright lilac, 

 lasting only a day; outer segms. oblong-cuneate, claret- 

 purple, whitish in the center, spotted and veined with 

 lilac, furnished with a deeply laciniated yellow crest; 

 inner segms. oblong, spreading; style-crests deeply 

 toothed. Himalayas. B.M. 6889. Near 7. tectorum, 

 but inferior. 



5. japonica, Thunb. (7. chinensis, Curt. 7. fimbri- 

 ata, Vent.). Fig. 1966. Lvs. ensiform, thick, smooth, 

 1-1 l /z ft. long: st. slender, as long as the Ivs., with a 

 raceme of lilac fls.: tube %in. long; outer segms. 1-1 H 

 in. long, with crimped margins, yellow on the claw, 

 crested; inner segms. smaller. Winter. Japan and China. 

 B.M. 373. Gt. 511. Gn. 28:120; 77, p. 142. J.H. III. 

 31:185. A.G. 12:704. F.R. 2:149. An evergreen 

 greenhouse plant except in Calif, where it does very 

 well outdoors in a shady border. 



SUBGENUS POGONIRIS. 



A. Plants dwarf: Ivs. generally less than 9 



in. long. 



B. Tube of the perianth 1 in. or more 

 in length. 



c. St. obsolete or very short 6. pumila 



cc. St. present, 1-10 in. long. 



D. Spathe-valves not keeled or only 



the outer one slightly keeled. 

 E. The st. almost entirely hidden 



by clasping hs. 

 F. The spathe-valves lanceo- 

 late, membranous, green. . 7. pseudo- 

 FF. The spathe-valves oblong, [pumila 



green or scarious above. . . 8. biflora 

 EE. The sts. bare above, with 1-2 



reduced Ivs. below the center. 9. Chamaeiri s 

 DD. Spathe-valves acutely keeled. . . . 10. Reichen- 



(See also I. imbricata No. 22) [bachii 



BB. Tube of the perianth short or none. 

 c. Spathe-valves green or only partly 



scarious. 

 D. Rhizome slender, stoloniferous: 



sheaths splitting into fibers. ... 1 1. flavissima 

 DD. Rhizome more compact: sheaths 



not splitting into fibers 12. mandshurica 



cc. Spathe-valves scarious, even in the 



bud 13. Cengialti 



AA. Plants tall: Ivs. generally more than 1 



ft. long. 



B. St. scarcely overtopping the Ivs. 

 c. The st. branched below the mid- 

 dle 14. aphylla 



cc. The st. branched above the middle, 



or unbranched. 



D. Spathe-valves wholly green when 

 the first fls. open, often flushed 



with purple, inflated . 15. variegata 



DD. Spathe-valves partly scarious 

 when the first fls. open. 



E. Fls. dull purple 16. lurida 



EE. Fls. dark violet 17. Kochii 



ODD. Spathe-valves entirely scarious 



at flowering-time 18. atroviolacea 



BB. St. much overtopping the Ivs. 



C. Spathe-valves entirely scarious at 

 flowering-time or even in the 

 bud. 



D. Fls. pale purple or lilac 19. pallida 



DD. Fls. white; segms. veined and 

 flushed with purple or lilac on 

 the margins. 



E. Sts. '2-3 ft. high 20. plicata 



EE. Sts. 1-iy^ft. high 21. Swertii 



cc. Spathe-valves green or partly 

 scarious. 



