Lulroduction. XXXiil 
Tuflorescence straight. 
Calyx in a broken whorl. Trailing or climbing herbs, 
‘ Convolvulacce, page 315 
Calyx in a complete whorl. 
Flowers symmetrical. Seeds usually kidney-shaped 
and pitted. Herbs or shrubs. Solanaceae, p. 326 
Anthers and stigmas consolidated. Seeds usually 
plumose. Herbs or shrubs. Aseli piadce, p. 300 
Anthers free from the stigma. 
Corolla imbricated. | Herbs with showy flowers 
and usually ribbed leaves. Gentianacea, p. 802 
Corolla valvate or convolute. Herbs with flowers 
in one-sided spikes. : . — Spigelia, p. 802 
Corolla contorted, Seeds usually plumose. Shrubs 
or trailing herbs. ange constricted in the 
middle . . Apoeynce, p. 297 
Flowers unsymmetrical. Leaves opposite, exstipulate. 
Flowers spicate or capitate, tetramerous. Shrubs 
Buddlea, p. 347 
Carpel single. Styles 5. Herbs or undershrubs Miumbuginacce, p. 380 
§§ Ovary superior. Flowers irregular. 
* Ovary d-lobed; lobes 1-seeded. Herbs or shrubs with opposite 
leaves usually furnished with immersed glands of aromatic 
fragrant oil : ‘ ‘ : - : . Labiate, p. 360 
** Ovary undivided. 
Carpels two. 
Fruit nucamentaceous, 2- or 4-celled. Herbs or shrubs 
Verbenacee, p. 357 
Fruit capsular or succulent. 
Placentas parietal. 
Annual herbs. Seeds not winged. Fruit terminated by 
a curved beak . : Martynia, p. 354 
Shrubs or herbs of trailing, tania or climbing habit. 
Fruit not beaked ; seeds winged : Bignoniacce, p. 351 
Placentas axile, 
Seeds albuminous. Herbs, shrubs, or trees with showy 
flowers : a . 3 ‘ Scrophularinee, p. 383 
Seeds exalbuminous. 
Seeds winged. Shrubs or herbs of climbing or trailing 
. habit and showy flowers. A . Bignoniacee, p. 351 
Seeds wingless, attached to hardy woody placentas. 
Herbs with elegant bipinnatifid leaves and leafy 
spikes of dull-coloured flowers : Acanthus, p. 355 
Placenta free, central. Stamens two. Aquatic or marsh 
herbs. is . : < , . Lentibularinee, p. 370 
§§§ Ovary inferior. 
* Carpels solitary. 
Anthers syngenesious (united with the pistil). Herbs or shrubs; 
flowers (florcts) collected in involucrate heads, Ovary 
usually surmounted by a scaly bristly or plumose calyx 
(pappus) . . . : . : Composite, p. 229 
Anthers free. 
b 
