SYNOPSIS OF TILE NA TUBAL ORDERS. xvii 



** Stamens inserted on the top of the ovary. 



42. Campantjlace.e Flowers regular or irregular. Stamens 5, separate 

 or connate. Ovary 2-8-celled, cells many-ovuled. — Herbs ; juice milky ; 

 leaves alternate, exstipulate ; flowers usually showy, (p. 243.) 



43. Ericaceae, Suborder Vaccinie.e. Flowers regular. Stamens 8 

 or 10. Ovary 4-5-celled. — Small shrubs ; leaves alternate, exstipulate. 

 (p. 249.) 



2. Ovary superior. Stam,ens epipetalous (hypogynous in 43 Ericace2e, 

 47 Oleineje (2 Fraxinus), 54 Plantagine^e (2 Littorella), and 45 



pLUMBAGINEiE). 



* Corolla regular. Stamens 8 or 10, rarely 5 or 6 ; anthers usually opening 

 by pores. Ovary A-Q-celled. 



43. Ericace^e, Suborder Erice.e. Leafy shrubs or trees, rarely herbs, 

 (p. 248.) 



44. Monotropejs. Leafless parasitic herbs, (p. 257.) 



** Corolla regular. Stamens 4-5, opposite the corolla-lobes. Ovary 1-celled ; 

 placenta central. 



45. Pltjmbagine^e. Styles or style-arms 5. Utricle 1 -seeded. — Mari- 

 time, rarely alpine, scapigerous herbs ; flowers small, (p. 257.) 



46. PrimulacejE. Style 1. Stigma capitate. Capsule 5-10-valved or 

 circumsciss, many-seeded. — Herbs; flowers often showy, (p. 260.) 



*** Corolla regular. Stamens 2, 4, or 5, alternate with the corolla-lobes. 

 Ovary 2-celled. Leaves opposite (except Menyanth.es). 



47. OleacEjE. Calyx 4-fid or 0. Corolla 4-lobed or 0. Stamens 2. 

 Ovary 2-celled, cells 2-3-ovuled. Fruit a drupe or samara. — Trees or 

 shrubs; leaves opposite, exstipulate. (p. 267.) 



48. Apocynaceje. Calyx 4-5 fid. Corolla 4-5-lobed, twisted in bud. 

 Stamens 4-5 ; anthers basifixed. Carpels 2, free below. Fruit of 2 

 follicles. — Shrubs ; leaves opposite, quite entire ; flowers often showy, 

 (p. 268.) 



49. Gentiane.e. Calyx 4-8-fid. Corolla 4-8-lobed, twisted in bud. 

 Stamens 4-8 ; anthers versatile. Ovary 1-celled ; ovules many, parietal. 

 Fruit usually capsular. — Herbs ; leaves opposite, quite entire (alternate, 

 3-foliolate in Menyanthes) ; flowers often showy, (p. 269.) 



**** Corolla regular or subregular. Stamens 4-5, alternate with the corolla' 

 lobes. Ovary 2-4-celled. Leaves alternate or radical. 



50. Polemoniace^e. Calyx 5-lobed. Corolla 5-lobed, twisted in bud. 

 Stamens 5. Ovary 3-celled ; stigma 3-fid. Fruit capsular. — Herbs ; leaves 

 pinnate, exstipulate; flowers showy, (p. 274.) 



51. Boragine.e. Calyx 5-lobed, valvate in bud. Corolla 5-lobed, im- 

 bricate in bud. Stamens 5. Ovary of 2 2-lobed 2-celled 2-ovuled carpels. 



