ANALYTICAL ARTIFICIAL KEY. 



Fruit capsular, 1 -celled or more, several-ovuled. 



Flowers naked, crowded in an involuerate spike: pungent herb with 



entire leaves. PII'EKACFJE, 89. 



Shmb with yellow axillary flowers : capsule 4 - 5-celled : leaves 



alternate, lobed. STEUCULIACE^E, 21. 



Low herbs with opposite leaves. 



Capsule 3 -5-celled : succulent. FICOIDE^E, 44. 



Capsule 1 -celled ; placenta central. 



Style and stigma one : stamens alternate with the sepals. 



Glaux in PRIMULACE^E, 57. 



Styles or stigmas 3 or more : stamens opposite the sepals. CARYOPHYLLACE^E, 14. 



Herbs without green foliage. Allotropa in ERICACE.E, 54. 



4. Ovary and fruit inferior. 

 Fruit many -seeded. 



Capsule 6-celled : flowers perfect, with 3-lobed valvate calyx : per- 

 ennial herbs : leaves entire, alternate. ARISTOLOCHIACE*;, 97. 

 Capsule 4-celled : stamens 4 : marsh herbs with entire opposite leaves. 



Ludwigia in ONAGRACE*, 39. 

 Capsule 1-celled with 3 parietal placenta : perennial herb ; leaves 



pinna tifid. 

 Capsule (half-inferior) 1-celled with 2 parietal placentae : leaves 



cordate. 



Fruit baccate : dioecious leafless parasites. 

 Fruit mostly 1 -seeded. 



Flowers perfect : fruit nut-like : perennial herbs with alternate entire 



leaves. 

 Dioecious parasites on trees, with opposite leaves and jointed stems : 



berry with glutinous pulp. 

 Aquatic herbs, with opposite or verticillate leaves. 



B. Flowers unisexual, at least the staminate in aments. Trees or shrubs, with alternate leaves. 



Monoecious : male flowers in aments ; female solitary or few : ovary inferior. 



Leaves pinnate, without stipules : fertile flowers and fruit naked. JUGLANDACE.S, 94. 

 Leaves simple, with caducous stipules. 



Anthers 2-celled : nut in a cup-like or spiny involucre. 

 Anther-cells separate : nut in a foliaceous or tubular involucre. 

 Monoecious or dioecious, flowers all in aments : ovary superior. 

 Fruit a 1 -seeded nutlet. 



Bracts thickened and rigid in fruit : nut winged or angled. 

 Bracts scaly : fruit wax-coated or drupe-like. 



Fruit a many-seeded capsule : dioecious : bracts herbaceous : seeds 

 comose. 



DATISCACE^E, 42. 



SAXIFRAGACEJE, 34. 

 RAFFLE.SIACK.E, 98. 



SANTALACE.E, 99. 



LORANTHACE^;, 100. 

 HALORAGE^J, 38. 



CUPULIFERiE, 95. 



COKYLACE*;, 96. 



BETULACE^E, 91. 

 MYRICACE^E, 92. 



SALICACEiE, 93. 



SUBCLASS II. GYMNOSPERMyE. Ovules naked upon a scale or bract or within a 

 more or less open perianth. Monoecious or dioecious trees or shrubs. 



Male flowers in aments : female subsolitary, the ovule within a double 



coriaceous integument with small terminal orifice : nearly 



naked dioecious shrubs. GNETACE.E, 101. 



Flowers dioecious, solitary, axillary : ovule becoming a bony seed 



within a fleshy envelope or cup. TAXACE.E, 102. 



Female flowers in aments becoming dry cones or berry-like : ovules 



naked at the base of a scale. CONIFERS, 103. 



CLASS II. MONOCOTYLEDONOUS OR ENDOGENOUS PLANTS. Woody fibres 

 of the stem scattered irregularly. Usually with the parts of the flower in threes and 

 leaves parallel-veined. Cotyledon simple. Mostly herbaceous. 



A. Ovary inferior : perianth conspicuous, colored : perennials. 



Aquatic : leaves opposite or whorled, 1-nerved : flowers dioecious, 



regular, axillary, solitary. HYDROCHARIDACEJE, 104. 



Terrestrial : flowers perfect. 



Flowers irregular : stamens and style coherent ; anthers 1 or 2 : 



leaves alternate, sheathing. ORCHIDACE^E, 105. 



Flowers regular : stamens 3, perigynous : leaves equitant. IRIDACE^;, 106. 



Flowers regular : stamens 6, perigynous: leaves not equitaut. AMARYLLIDACE^E, 107. 



