136 
The Pogoniris Section 
S’ 
6 . 
7 - 
8 . 
9 - 
io. 
ii. 
12 . 
13- 
14 - 
J5- 
1 6. 
1 7 
1 8. 
{ Spathe valves narrow lanceolate. 
Spathe valves comparatively short and broad. 
Spathe valves persistently green, tube 2 — 3 in. long. 
Spathe valves membranous, almost transparent, scarious at the tip, tube 1 — 
1$ in. long. 
I Rhizome more or less stoloniferous ; seeds with minute aril ; leaves thin, 
narrow, almost linear. 
Rhizome more compact ; seeds without any conspicuous aril ; leaves thicker, 
broader, ensiform. 
Spathes narrow, membranous, young shoots green, growths separated by 
slender stolons. 
Spathes broader, growth more compact 
Spathes broad for their length, distinctly veined and flushed with reddish 
brown. 
Spathes not noticeably broad, green, 
f Perianth-tube twice as long as the ovary ; spathes short. 
I Perianth-tube three or more times as long as the ovary. 
{ Spathe-valves wholly green. 
Spathe-valves not wholly green. 
{ Spathe-valves linear, membranous. 
Spathe-valves oval, green for the most part and only scarious in the upper half. 
Stem branching at the centre or below, often at the very base ; leaves 
dying entirely away before the winter. 
Stem branching in the upper part. 
f Spathe- valves wholly scarious before the flowers expand. 
(Spathe-valves not wholly scarious when the flowers expand, 
f Spathe-valves silvery white, plants 2 feet or more high. 
I Spathe-valves pale brown scarious, plants much dwarfer. 
( Spathe-valves membranous, not scarious, much inflated. 
I Spathe-valves green or partly scarious, not conspicuously inflated. 
Outer segments (falls) strap-shaped, the haft bearing thick dark veins that 
end abruptly at a straight transverse line. 
Outer segments (falls) more obovate, haft only slightly veined, plant dwarfer. 
jSpathe-valves wholly green, not scarious, when the first flowers expand. 
I Spathe-valves partly green and partly scarious, when the first flowers expand. 
6. 
I. Reichenbachii (p. 15!), 
I. mellita (p. 149). 
I. scariosa (p. 178). 
8 . 
10. 
I. flavissima (p. 137). 
9- 
I. Bloudowii (p. 138). 
I. mandshurica (p. 140). 
I. chamaeiris (p. 148). 
II. 
I. Griffithii (p. 184). 
12. 
I. pseudopumila (p. 146). 
/. subbiflora (p. 145). 
/. aphylla (p. 157). 
14. 
15- 
16. 
I. pallida (p. 166). 
I. Cengialti (p. 168). 
17- 
18. 
I. Alberti (p. 181). 
/. imbricata (p. 179). 
19- 
20. 
Spathe-valves short and broad, somewhat inflated, leaves thin and distinctly I. variegata (p. 159). 
ribbed, plant not more than 18 in. high. 
Spathe-valves long and narrow, less inflated, leaves thicker and less dis- I. kashmiriana (p. 182). 
tinctly ribbed, plant much sturdier and taller, 2 — 3 feet 
[N.B. The remaining seven are extremely difficult and in some cases impossible to separate as herbarium 
specimens ; some of them probably scarcely deserve specific rank (see p. 177) ] 
Leaves short, glaucous, not growing to any extent until the winter is over, I. Junonia (p. 174). 
resembling those of I. pallida ; spathes pale green, scarious in the 
upper part 
Leaves longer, beginning to grow in the autumn and attaining some length 21. 
before the winter. 
21. 
22. 
23 - 
24. 
25. 
Spathe-valves narrow, acuminate. 
Spathe-valves broader, more navicular. 
Spathe-valves almost wholly green, scarious only at the extreme edge and tip. 
Spathe-valves much flushed with purple, scarious in the upper third or half. 
Spathe-valves much flushed with purple, scarious in the upper half. 
Spathe-valves not flushed with purple. 
Flowers nearly sessile on the comparatively short, thick stem. 
22. 
23 - 
I. Biliotti (p. 175). 
I. trojana (p. 175). 
I. germanica (p. 162). 
24. 
I. albicans (/. Madonna ) 
(p. 161). 
Flowers borne on lateral branches ; stem far overtopping the leaves. 25. 
Spathe-valves broad, membranous, only scarious in the upper third ; leaves I. mesopotamica (p. 176). 
broad, tapering conspicuously above and below the middle. 
Spathe-valves broad, membranous, the outer valve nearly wholly scarious; I. cypriana (p. 177). 
leaves comparatively narrow for so large a plant and with parallel 
sides, not noticeably wider in the middle. 
