KEY TO PLATE XXIII 



No. i. Wood Sage 

 ( Teucrium Scorodonia, L.) 

 a, Flower showing the 2 

 small lateral lobes and trun- 

 cate upper lip, and large lower 

 lip ; exterior of corolla hairy, 

 and 4 exserted stamens, 2 

 long, 2 short. , Calyx, per- 

 sistent, bell-shaped, 5-lobed, 

 with broader upper lip bent 

 back, and persistent bifid 

 stigma, and long style. <:, 

 Inflorescence, with paired 

 stem-leaves below, forming 

 unilateral raceme with nu- 

 merous whorls of 2-3 flowers, 

 and bracts at their base. 



No. i^Wood Spurge 



bia amygdaloideS) L,^ 

 Flower with bracts re- 

 ved, showing crescentic 

 stamens, and pistil 

 (drooping), b, Capsule (2- 

 lobed). c, Inflorescence, 

 with stem-leaves at base, 

 and made up of flowerheads 

 with many male and i female 

 flov/ers, subtended by con- 

 nate bracts, in 3 many-rayed 

 umbels, with the cuspidate 

 glands within each involucre 



No, 3. Dog's Mercury ! v 

 (Mercurials perennis y L^ ;" ^ 

 a, Male flower, with 9 

 stamens, with 3 sepals *", 

 Female flower, with central 

 pistil, with 2 hairy ovaries, 

 and long bent-back styles. 

 f, Didymous, hairy capsules. 

 d, Raceme, with male flowers 

 in the axils of bracts on long 

 stalks, e, Flowering stem 

 with lance -shaped leaves, 

 shortly-stalked opposite, de- 

 cussate, and female flowers 

 in f . short spikes, showing 

 ovaries and stigmas. 



No. 4. Wych Elm 

 (Ulmu s glabra, Huds.^l 

 a, Staminate flower, show- 

 ing bell-shaped 5-fid calyx, 

 and exserted purple anthers 

 on 'long filaments. , J-Iori- 

 zontal section of winged 

 fruit, with i seed in the 

 centre of the samara. c, 

 Part of branch, with leaf 

 unequal at the base, with 

 notched margin, and a cluster 

 of lateral fruits, showing the 

 broad wing, and central seed 

 of -the samara; d, Flowering 

 twig, with several clusters of 

 flowers, showing the flowers 

 with anthers exserted, and 

 the scales below which grad- 

 ually drop off. 



5. Oak 

 Robur, L.) 



,nVwer, wn 



8 stamen/, aM dWply di 

 calyx. < / b, P/fstillate flower, 

 with imbricate bracts enilos/' 

 ing pistil, 3 styles aboyje. !c,\ 

 Twig with lobed leaves, with 

 no auricle at .the base, stip- 

 ules, and male flowers in 

 catkins, female flowers in 

 a spike, d, Acorn, or fruit, 

 one developed with cupule, 

 one undeveloped bV iong 



a, Pistillate flower with 

 ovary, and 3 styles above. 

 s&l -^ Fruit (beech - m **$'' ^r 

 angled, c. Four-fid involucre 

 01 cujiule of female flower. 

 Twig with long -stalked 

 hairy leaves, scale-like stipule, 

 and staminate tassel-like 

 flowers, with many stamens 

 and overlapping bracts be- 

 low, pendulous capitate. 



^ V; 



