XX SY2T0PTICAL KEY. 



58. Styraceae, i>. 470. Fruit fleshy, becoming dry, 3-valved, 1-seeded. Calyx trancate : pet- 



als 4 to 8, nearly distinct : "stamens 10, mouadelphous : style 1. Shrub, with alternate 

 entire leaves. 



59. Oleaceae, p. 471. Fruit a simple samara, usually 1-celled and 1-seeded (or a 2-celled drupe 



or capsule). Flowers 4-merous, perfect or dioecious : petals often none : stamens usually 

 2 : style 1. Shrubs or trees, with opposite pinnate or simple leaves. 



++ ++ Carpels 2, iinited by their styles or stigmas, becoming distinct follicles with numerous comose 

 seeds. Perennial herbs, with milky juice, and opposite entire leaves : flowers 5-merous. 



60. Apocynaceae, p. 472. Corolla convolute in the bud. Anthers nearly free : pollen powdery. 



61. Asclepiadaceae, p. 474. Corolla and calyx nearly valvate. Anthers attached to the stig- 



ma ; pollen in waxy masses. 



++ ++ ++ Fruit 1-celled : placentae 2, parietal (sometimes united in the axis). 



62. Gentianaceae, p. 478. Capsule septicidal, few - many-seeded. Flowers 4 -5-merous : style 



1 or none ; stigmas 1 or 2. Glabrous herbs, with simple and opposite or 3-foliolate and 

 alteiiiate leaves : inflorescence not scorpioid. 



64. Hydrophyllaceae, p. 501. Capsule loculicidal, few - many-seeded. Flowers 5-merous: 



styles 2, usually more or less distinct. Herbs {Eriodictyon shrubby), often rough-hairy, 

 with alternate (rarely opposite) often compound leaves, and mostly scorpioid inflorescence. 



++ ++ ++ ++ Fruit 2 - 4-celled, with centi-al placentce. 



75. Plantaginaceae, p. 610. Capsule 2-celled 2 - few-seeded, circumscissile. Flowers 4-me- 

 rous : stamens 2 or 4 : style 1 : corolla scarious. Acaulescent herbs. 



66. Convolvulaceae, p. 532. Capsule 2-celled, 1 - 4-seeded, 2-valved or circumscissile. Flow- 



ers mostly 5-merous : styles 1 or 2. Herbs, mostly tvraning, with alternate leaves, or 

 parasitic and without green herbage. 



65. Borraginaceae, p. 518. Ovary 4-celled and mostly 4-lobed, maturing usually as many 



1-seeded nutlets. Flowers 5-merous : style single. Herbs, mostly rough-hairy, with 

 alternate (or the lower opposite) entire leaves, and scorpioid inflorescence. 



63. Polemoniaceae, p. 485. Capsule 3-celled, 3 - many-seeded, loculicidal. Flowers 5-merous : 



style 3-eleft. Herbs (rarely woody at base), with ox)posite or alternate simple or com- 

 pound leaves. 



67. Solanaceae, p. 537. Fruit a berry or capsule, 2-celled (rarely more), many-seeded. Flowers 



5-merous : style simple : corolla valvate or plaited in the bud. Herbs (rank-scented) 



or shrubs, with alternate simple or pinnate leaves. 

 Capsule didymous, mostly 2-parted, circumscissile, 2 - 4-seeded. Stamens 2 or 3 : style 1. Nearly 



herbaceous, .with mostly opposite sessile leaves. Menodora in Oleacece. 

 Capsule 2-celled, many-seeded. Flowers 5-merous : style single : corolla irregular, imbricate. 



Herbs with alternate leaves and racemose flowers. Vkkbascum hi Scrophulariacece. 

 Capside imperfectly 3-celled, several-seeded. Flowers 5-merous : stamens 10 or more : styles 3. 



Seeds thin, winged or comose. Small spinescent trees. Fouquiera in Tajnariscinecc. 



* * Flowers ii-regular. Fei-tile stamens 4 and didynamous, sometimes 2. 



-i- Fruit capsular, 1 - 2-celled : style 1. 



++ Seeds albuminous. 



68. Scrophulariaceae, p. 546. Capsule 2-celled, with central placentse, few - many-seeded. 



Corolla imliricated. Herbs or sometimes woody, with alternate or opposite leaves. 



69. Orobauchaceae, p. 583. Capsule 1-celled, 2-valved, with 2 - 4 parietal placenta-, many- 



weeded. Parasitic herbs, without gi'een foliage : .scales alternate. 



++ ++ Seeds without albumen. 



70. Lentibularieae, p. 586. Capsule 1-celled, vrith central placentae, bursting irregularly, many- 



seeded. Stamens 2 ; anthers 1-celled. Floating herbs, with capillary dissected leaves. 



71. Bignoniaceas, p. 586. Capsule (linear) 1 - 2-('elled, 2-valved, with numerous winged and 



tultcil sci'ils. Shrubs, with linear entire opposite or alternate leaves. 



72. Acanthaceae, \^. 587. Capsule clavate, 2-celled with central placentte, 4-seeded : seeds on 



hook-like processes of the placentae. Stamens mostly 2. Herbs or shrubs ; leaves opposite. 



■i- -h- Fruit of 2 or 4 distint;t or united 1-seeded mrtlets. 



73. Labiatae, ]>. 589. Ovary 4-lobed around the 2-cleft style, forming as many distinct nutlets. 



Stamens 4 or 2. Mostly aromatic herbs or woody at base, with square stems, and 

 o]iposite simple leaves. 



74. Verbenaceae, p. 607. Ovary not lobed, 2 -4-celled; fruit -splitting into as many nutlets. 



Stamens 4 : style 1. Herbs or shrubby, rarely aromatic ; leaves opposite or whorled. 



