72 MEDICAL BOTANY. 



Group XXII. — Umbellales. 



Ovary compound, 2 (sometimes 3-5) celled, with a solitary ovule suspended 

 from the top of each cell. Stamens usually as many as petals or lobes of 

 adherent calyx. Embryo in a large quantity of albumen. 



Order 53. — Apiaceje. — Fruit didymous, with a double epigynous disk. 



Order 54. — Araliace^e. — Fruit not didymous, nor with a double epigy- 

 nous disk. Flowers pentamerous. Corolla valvate. Leaves alternate, 

 exstipulate. 



Order 55. — Cornaceje. — Fruit not didymous, no double epigynous disk, 

 2 to more celled. Flowers tetramerous. Corolla valvate. Leaves opposite, 

 exstipulate. 



Order 56. — -Hamamelidaceje. — Fruit not didymous, no double epigynous 

 disk, 2-celled. Corolla imbricated. Leaves alternate, stipulate. 



Sub- Class II.— Monopetalons Exogenous Plants* 



Floral envelopes consisting of both calyx and corolla ; the petals more or 

 less united. 



Group XXIII. — Cinchonales. 



Ovary coherent with the calyx, 2 to several celled, with one or more ovules 

 in each cell. Seeds albuminous. Stamens inserted on the corolla. 



Order 57. — Caprifoliace^e. — Stamens epipetalous ; anthers straight, 

 bursting longitudinally. Fruit consolidated. Leaves exstipulate. 



Order 58. — Cinchonace^. — Stamens epipetalous ; anthers straight, burst- 

 ing longitudinally. Leaves stipulate. 



Order 59. — Rubiace^e. — Stamens epipetalous ; anthers straight, bursting 

 longitudinally. Fruit didymous. Leaves verticillate ; exstipulate. 



Group XXIV. — Valerianales. 



Ovary coherent to the calyx, with one cell and one ovule, sometimes with 3 

 cells, two of which are abortive. Seeds suspended. Embryo with little or no 

 albumen. Stamens distinct, inserted on the corolla. 



Order 60. — Valerianace^e. — Corolla imbricated. Anthers free. Ovary 

 one-celled. Ovule pendulous. Exalbuminous. 



Group XXV. — Asterales. 



Ovary coherent to the calyx ; one-celled. Seeds erect. Stamens syngene- 

 sious. Exalbuminous. 



Order 61. — Asterace^b, — Corolla valvate. Anthers syngenesious. Ovule 

 erect. Exalbuminous. 



Group XX V I. ^— Camp an ales. 



Ovary coherent to the calyx, with two or more cells and numerous ovules. 

 Stamens inserted with the corolla. Anthers not opening by pores. 

 • Order 62. — Campanulaceve. — Ovary 2 or more celled. Anthers free, 

 or half united. Stigma naked. Corolla regular ; valvate. 



Order 63. — Lobeliace^e. — Ovary 2 or more celled. Anthers coherent. 

 Stigma surrounded by hairs. Corolla irregular; valvate. 



Group XXVII. — Ericales. 

 Ovary free from the calyx, superior, or sometimes coherent with it; with 



