LINNjEAN artificial arrangement. lxv 
CLASS XXII. DICECIA. 
Order Monandria. Stamen 1. 
Naias. Flowers axillary, sessile. Calyx and corolla none. 452 
Order Diandria. Stamens 2. 
Salix. Sterile and fertile flowers both in catkins, naked (stam. 1-6). 424 
Order Triandria. Stamens 3. 
Vallisneria. Pod cylindrical, 1-celled, many-seeded (aquatic). 463 
Carex. Achenium in a sac. 535 
Empetrace®. Drupe 3-9-celled, 3-9-seeded. Leaves Heath-like. 409 
Order Tri-Pentandria. Stamens 3-5. 
* Stamens 3 or 4. 
Viscum. Anthers sessile on the calyx-lobes. Berry 1-celled, 1-seeded. 398 
* * Stamens 4 or 5. 
Negundo. Fruit a double samara. Leaves compound. 81 
Myrica. Fruit a dry drupe. Flowers in short aments. 420 
Urtica. Fruit an achenium. Flowers spiked and panicled. 435 
* * * Stamens constantly 5. 
-♦-Calyx adherent: fruit large, drupe-like. 
Pyrularia. Style 1. Fruit pear-like, 1-celled, 1-seeded. 398 
-♦--♦-Calyx free from the 1-celled and 1-seeded dry fruit: corolla none. 
Cannabine®. Calyx of one sepal, folding round the achenium. 435 
Amaranthus. Calyx 3-5-sepalled. Utricle smooth, opening by a lid. 384 
Acnida. Calyx 3-5-sepalled. Achenium crustaceous, 3-5-ridged. 381 
-•—♦—•-Calyx free from the drupe-like achenium : petals 5. 
Rhus $ Lobadium. Fruit hairy. Styles or stigmas 3. 79 
—•-Calyx free from the 3-5 distinct pistils. 
Zanthoxylcm. Pods 2-valved, short-stalked, few-seeded. 77 
Order Hexandria. Stamens 6. 
Rum ex. Achenium 3-angular, covered by the inner conniving sepals. 391 
Smilax. Berry l-3-seeded, free from the perianth. 485 
Cham®lirium. Pod 3-celled, ovoid, many-seeded. 502 
Djoscorea. Pod 3-celled, 3-winged, 3-seeded : calyx adherent. 484 
Order Oct-Polyaiidria. Stamens 8 - many. 
* Flowers with calyx and corolla. 
Gymnocladus. Petals 5, on the calyx. Pod 1. Ill 
Menispermum. Sepals and petals 4-8, distinct. Drupes 1-4. 19 
* * Calyx regular: petals none. 
Laurace®. Calyx petal-like, 6-parted. Stamens 9. Drupe free. 394 
Shepherdia. Calyx 4-cleft: the tube becoming berry-like and in¬ 
closing the achenium. Stamens 8. 396 
* ♦ * Calyx and corolla none. 
Populus. Flowers in catkins. Stamens 8-40. Pod 1-celled. 430 
Order Moxxadelpliia. Stamens united by their filaments. 
* Flowers in a kind of short catkin : ovules naked, on the scales. 
Taxus. Scales empty at the base of the naked cup shaped berry. 444 
Juniperus. Scales of the fertile catkin 3-6, forming a sort of drupe. 444 
* * Flowers with calyx and corolla. 
Nap® a. Calyx 5-toothed. Styles 8. Pod 8-celled, 8-seeded. 69 
Limnobium. Calyx 3-parted. Petals 3. Berry 6-9-celled, many- 
seeded. ^ H 462 
/• 
