12 SYNOPSIS OF THE ORDERS. 



++ ++ Corolla regular, its lobes 4 - 5 or rarely more ; stamens as many. 

 = Ovaries 2, becoming follicles; stigmas and sometimes the styles united; 

 herbs with milky juice, perfect 5-merous flowers, and simple entire leaves. 



66. Apocynaceae (p. 337). Stamens distinct or the anthers merely conni- 

 vent, with ordinary pollen. Style 1. 



67. Asclepiadaceae (p. 338). Stamens monadelphous, the anthers perma- 

 nently attached to a large stigmatic body ; pollen mostly in waxy masses. 

 Styles distinct below the stigma. 



= = Ovary compound (ovaries two in Dichondra), with 2 or 3 (rarely 4 or 5) 

 cells or placentae ; stamens distinct ; mostly herbs. 



a. Leaves opposite ; corolla-lobes 4 or 5 or more. 



68. Loganiaceee (p. 345). Leaves entire, with stipules or a stipular line 



joining their bases. Capsule 2-celled, few - many -seeded. Herbs or 

 woody twiners (our species). 



69. Geutianaceae (p. 346). Glabrous herbs ; leaves entire, sessile and sim- 

 ple (except in Menyanthes). Capsule 1-celled with 2 parietal placentae 

 or the whole inner surface ovuliferous, many-seeded. 



b. Leaves alternate (sometimes opposite in Polemoniaceae and Hydrophyl- 

 laceae) ; corolla-lobes always 5 in our species. 



70. Polemoniaceae (p. 354). Capsule usually 3-celled, loculicidal; seeds 



1 -many in each cell on the stout placeutal axis. Style 3-cleft or -lobed. 

 Leaves opposite or alternate, simple or compound. 



71. Hydrophyllaceae (p. 357). Leaves often lobed or divided, and the in- 



florescence frequently scorpioid. Style 2-parted or 2-lobed. Capsule 

 1-celled, 2-valved with two parietal or introflexed placentae, or sometimes 

 2-celled. Seeds 2 or more on each placenta. 



72. Borraginaceae (p. 360). Leaves mostly entire and plants often rough- 



hispid ; inflorescence commonly scorpioid. Style 1 . Ovary 4-ovulate, 

 usually 4-lobed and maturing as 4 separate or separable nutlets, or not 

 lobed, 2-4-celled and separating when ripe into 2 or 4 nutlets. 



73. Convolvulaceae (p. 367). Usually twining or trailing ; flowers on ax- 

 illary peduncles or cymose-glomerate. Corolla 5-lobed or 5-plaited, 

 twisted in the bud. Styles 1 or 2. Ovary 2- (sometimes 3- or spuriously 

 4-) celled, becoming a globular 4-6-seeded capsule (or ovaries two and 

 distinct in Dichondra). Cotyledons broad-foliaceous. 



74. Solanaceae (p. 373). Style 1. Ovary 2-celled (rarely 3- 5-celled), with 

 numerous ovules on axillary placentae, becoming a pod or berry. Cotyle- 

 dons narrow. 



*+ -M. . Corolla more or less bilabiately irregular (sometimes nearly regular), 

 5-lobed. Fertile stamens 4 and didynamous, or 2. Style 1. Ovary 

 always of two carpels. 



a. Ovules several or many. 



75. Scrophulariaceee (p. 377). Capsule 2-celled, with central placentae. 

 Seeds small, usually numerous. Herbs ; leaves alternate or opposite. 



76. Orobanchaceae (p. 393). Root-parasites with no green foliage. Cap- 

 sule 1-celled, with 2 simple or double parietal placentas. Seeds many. 



