430 ILLUSTRATIONS OF TIIIC NATURAL ORDIvRS. 



four-) celled, with numerous ovules. Corolla bilabiate or irregular; tbe 

 stamens inserted upon its tube, and mostly fewer than its lobes. 



Ovary 1-celled with a central placenta. Stamens 2. Lentibolace.e. 



Ovary 1-ccllcd, or spuriously 2- 5 -celled with parietal placenta;. 

 Seeds very numerous and minute, albuminous. 

 Plants destitute of green herbage. Orobanchace^e. 



Plants with green herbage. Gesneriace^e. 



Seeds few or many, large : albumen none. Bignojjiace.e. 



Ovary 2-ccllcd, with the placenta; in the axis. 



Corolla convolute in activation. Seeds few ; no albumen. AcanthacevE. 

 Corolla imbricated in aestivation. Seeds albuminous. Scrophulariacejs. 



Gioup 9. Ovary free, two- to four-lobcd, or at least separating or splitting 

 into as many one-seeded nuts or achenia, or drupaceous. Corolla tegular 

 or irregular ; the stamens inserted on its tube, equal in number or fewer 

 than its lobes. Albumen little or none. 



Stamens 4, didynamous, or 2. Corolla more or less irregular. 



Ovary not 4-lobed : style terminal. Verbenace;e. 



Ovary of 4 lobes around the base of the style. Labiatve. 



Stamens 5. Flower regular. Leaves alternate. Borraginace^e. 



Group 10. Ovary free, compound, or rarely the carpels two or more and dis- 

 tinct : the ovules usually several or numerous. Corolla regular ; the sta- 

 mens inserted upon its tube, as many as the lobes and alternate with them. 

 Seeds albuminous. 



riacenta; 2, parietal (sometimes expanded or united). Embryo minute. 



Hairy herbs. Albumen cartilaginous. Hydrophillaceje. 



Smooth herbs. Albumen fleshy. Gentianacea:. 



Placenta; in the axis : ovary with 2, 3, or rarely several cells. 



Embryo large, coiled or folded. Seeds few. Convolvulaceje. 



Embryo straight, with broad cotyledons. Polemoxiackje. 



Embryo curved, rarely straight, slender. Seeds numerous. Solaxace.e. 



Group II. Ovaries 2 and distinct (or sometimes united), but the stigmas united 

 into one and often the styles also. Stamens as many as and alternate with 

 the lobes of the regular corolla, which is convolute, or rarely valvate in 

 aestivation. Anthers often connected with the stigma. Fruit usually a pair 

 of follicles. Seeds mostly numerous, often comose. Embryo large and 

 straight, in sparing albumen. Juice milky. 



Pollen powdery. Apocynace^e. 



Pollen in waxy or granular masses. Asclepiadace^e. 



Group 1 2. Ovary free, two celled, the cells mostly two-ovulcd, and the fruit one- 

 seeded. Co:olhi regular (sometimes nearly polypetalous or wanting) ; the 

 stamens (two) fewer than its lobes. — Shrubs or trees. 



Seeds erect. Corolla imbricated or contorted in aestivation. Jasmivace^e. 



Seeds suspended. Corolla valvate in aastivation. Oleace^e. 



