LINNjEAN artificial arrangement. 
Ixiii 
CLASS XIX. STNGEXESIA. 
Order Polj gamia iBqnalisi. Flowers in a head (Flower compound, 
L.), all perfect. 
Composite. Nos. 1, 3-8, 19, 37, 50, 51,56-69. 184 
Order Poly gamin Snperflua. Flowers in a head (compound), all 
fertile, the marginal pistillate only. 
Composite. Nos. 9 -11,13- 18, 20 - 24, 30,31,38,39,41-49, 51,52. 184 
Order Polygamia Frustrnnca. Flowers in a head (compound), 
the marginal neutral, the rest perfect. 
Compositje. Nos. 12, 32-37, 40, 53, 54. 184 
Order Polygamia IVecessaria. Flowers in a head (compound), the 
central staminate, the marginal pistillate and fertile (or mono dioecious) 
Compositje, Subtr. Melampodine.*. Nos. 25-29. 218 
Order Polygamia Segregata. “ Flowers each with their own invo¬ 
lucre,” or, more properly, Heads 1 - few-flowered, aggregated into a com¬ 
pound head. 
Composite. No. 2. (Elephantopus.) 190 
Order llonogamia. Flowers separate (not compound). 
Violace.®. Flowers polypetalous, irregular. Style club-shaped. 43 
Impatiens. Flowers polypetalous, very irregular. Stigma sessile. 76 
Lobelia. Corolla monopetalous, irregular. Style 1. Pod 2-celled. 253 
Apocynum. Corolla monopetalous, regular. Pods 2 : stigma 1. 364 
CLASS XX. GYNANDRIA. 
Order Dlandria. Stamens (apparently) 2, really but one of 2 anther- 
cells, except in Cypripedium. 
Orchidaceae. Flower irregular, epigynous. 463 
Order Pentandria. Stamens 5. 
Asclepiadaceje. Calyx and corolla regular, hypogynous. Pods 2. 365 
Order Hex-Dodecandria. Stamens 6-12. 
Aristolochiace.e. Calyx epigynous : corolla none. Fruit 6-celled. 374 
CLASS XXI. MOXCECIA. 
Order Monandria. Stamen 1. 
Lemna. Flowers bursting from the side of a floating frond. 449 
Zostera. Flowers on a leaf-sheathed spadix. 453 
Zannichellia. Flowers axillary, sessile : the fertile of 2 -5-pistils. 453 
Euphorbia. Flowers in a cup-shaped involucre. Ovary 3-celled. 403 
Order Di-Triaudria. Stamens 2-3. 
* Stamens aggregated in a common spike or head, naked. 
Typha. Flowers all in a spike, intermixed with down. 450 
Sparganicm. Flowers in heads, naked, the fertile bracted. 451 
* * Stamens in the axils of bracts. 
Carex. Achenium lenticular or triangular, inclosed in a sac. 535 
Scleria. Achenium globular, crustaceous or bony, naked. 534 
Tripsaccm. Grain inclosed in cartilaginous glumes, sunk in the 
joints of the spike. 615 
Order Trl-Polyandria. Stamens 3- many, distinct. 
* Staminate flowers naked, crowded together without regular bracts. 
Herbs : both kinds of flowers in one spike (spadix). 
Araceae. Spadix surrounded by a spathe. Berry 1-celled. 
445 
