KEY TO PLATE XXIV 



No. I. Aspen 

 (Populus tremuta, L.) 

 a, Pistillate flower, 

 with ovary, and 4-fid 

 stigma enclosed, and 

 laciniate downy scale. 

 , Staminate flower, 

 with long-stalked sta- 

 mens, and subtending 

 ciliate scale. c, Fe- 

 male catkins, with 

 scales at the base, 

 and buds. </, Foliage 

 leaf, with compressed 

 leaf-stalk and crenate 

 border. Across this 

 lies a male catkin 

 with tuft of scales be- 

 low, and some unex- 

 panded buds. 



No. 2. Tway-blade 

 (Listera ovata, Br.) 

 a, Flower enlarged, 

 showing small upper 

 lip, and lateral lobes, 

 of labiate corolla, and 

 the long-forked lower 

 lip ; also some sepals ; 

 and within the corolla 

 the anther and 2 pol- 

 linia. b, Raceme of 

 flowers, in various 

 stages, and below 

 scape and 2 ovate 

 paired leaves nearly 

 opposite. 



| ' 



-'(?/ 



No. 3. Bee Orchid 



(Ophrys apt/era, 



Huds.) 



a, Flower enlarged, 

 showing the spread- 

 ing . .perianth, and 

 bee-like markings of 

 the 3-lobed lower lip, 

 and 3 pink ovate se- 

 pals, the column and 

 arched anther, pollinia, 

 and tubercles at the 

 base of the lateral 

 lobes. 6, One of the 

 pollinia. f, Spike, with 

 oblong leaf, and flowers 

 in various stages, en- 

 closed in large leafy 



No. 4. Snowdrop 

 (Galanthus nivalis, L.) 



tf. Ovoid bulb, with 

 roots below, anc; 

 sheath. ^ Scape, 

 with 2-fid leaves, and 

 drooping flower en- 

 closed in membranous 

 spathe,with large white 

 outer perianth ' seg~, 

 ments, and petals with 

 green notched honey- 



b 



No. 5. Lily-of-the- Valley 

 (Convallaria majalis, L.) :\ \ 



**^N. V('' "VI V ~~~VV \ 



a, Vertical section of bell- 

 shaped flower, showing 3 (out 

 of 6) segments of perianth, 

 the lobes bent back, and ' 

 included epipetalous, sta- 

 mens with ovary and simple 

 style, showing 2 seeds in a 

 cell. , Arrow-shaped anther, 

 on short filament, enlarged. 

 c, Berry, globose, d, Scape 

 with ovate leaf, sheathing 

 leaf-stalk, and sheaths below, 

 with raceme of flowers, in 

 axils of scaly bracts showing 

 flowers drooping. 



6 



o. 6. 

 \sillium u-.'sinum, L.) 



ertical section of bell- 

 shaped flower, showing 3 (out 

 of 6) free perianth segments, 

 3 (out of 6} hypogynous 

 stamens, 3-angled ovary and d 

 ovule in cell, with thread- 

 liice style and simple stigm? 

 above. /;, Capsule, 3-lobed, 

 with persistent style. c, t 

 Radical leaf, grooved above/' ^ 

 not fistular, ovate, d, Scap4 | 

 with bracts below, the um- 

 bel of flowers, and fruits, in 

 various stages, on long pedi- 



~- 



eels. 



No. 7. Bluebell 

 (Scilla non-scripta, 

 Hoffm. and Link) 



, Vertical section of bell- 

 shaped corolla, showing re- 

 flexed lobes, epipetalous st,a- 

 mens, and rounded ovary, 

 with long style, and simple 

 3tigrna. , Section of cap- 

 sule, trilocular, 3- Calved, with 

 * or more ovules in each 

 loculus. c, Concave linear 

 lance- shaped leaves. </, 

 Scape, with raceme of 6 

 drooping flowers with 2 

 purple bracts below, on short 

 curved pedicels. 



-urstiium, L,.}. 77 ETI 



