LINNJ2AN ARTIFICIAL ARRANGEMENT. 
lvii 
■++ 'M* ++ ++ ++ Pod 1 celled with 2 parietal placentae. 
Hydrophyllacea:. Leaves alternate, lobed or compound. Corolla 
convolute or imbricated. 340 
Menyanthideje. Leaves alternate. Corolla valvate-induplicate in 
the bud. 362 
Gentianeje. Leaves opposite, simple, entire. Corolla convolute. 356 
Order Digynia. Styles or sessile stigmas 2 (only). 
* Corolla monopetalous, free (inferior). 
■+-Stigmas separate : style short or none : seeds naked. 
Gentianea:. Pod 1-celled, with 2 parietal placentae. 356 
Stigma forming one mass : but the styles and pods (follicles) separate : 
seeds with a silky tuft at the end. 
Apocynum. Pollen powdery : anthers merely converging. 364 
Asclepiadacea:. Pollen in (waxy) masses : anthers united with the 
stigma. 365 
# # Corolla polypetalous. 
-•-Calyx-tube partly adherent to the many-seeded 2-horned pod, bearing 
the petals. 
Heuchera. Pod 1-celled. Seeds marginless. 149 
Sullivantia. Pod 2-celled. Seedswing-margined. 149 
-•--•-Calyx-tube wholly adherent to the 2-seeded fruit, its minute limb and 
the stamens epigynous. (Flowers in umbels.) 
Umbellifera:. Fruit dry, splitting into seed-like carpels. 153 
Panax. Fruit a berry like drupe. (Styles often 3.) 166 
* * * Corolla none. (Calyx free. Fruit 1-seeded.) 
- 4 -Ovary 1-celled, 1-ovuled. 
Chenopodiacea:. Utricle inclosed in the calyx : stam. at the base. 375 
Scleranthus. Utricle in the calyx-tube : stamens on its throat. 65 
Polygonum. Achenium lenticular. Stipules a tubular sheath. 386 
Celtis. Drupe globular. Leaves rough. 400 
-•--♦-Ovary 2 celled, an ovule in each cell. 
Ulmus. Fruit flat, winged (a samara), 1-seeded. Leaves rough. 399 
Order Trigynia. Styles or sessile stigmas 3. 
* Corolla none. * 
Ambrina. Utricle partly inclosed in the green calyx. 379 
Polygonum. Achenium triangular. Calyx petal-like. 386 
* * Corolla monopetalous. (Fruit a drupe or berry.) 
Viburnum. Leaves simple. Drupe flattish, 1-celled, 1-seeded. 174 
Sambucus. Leaves pinnate. Fruit berry-like, 3 seeded. 173 
* * * Corolla polypetalous. 
Rhus. Drupe dry, hairy, 1 celled, 1 seeded. 78 
Staphylea. Pod 3 celled, inflated, few seeded. 83 
Hypericum. Pod 1-celled, with 3 parietal many-seeded placentae. 52 
Spergularia. Pod l-celled, many-seeded on a central placenta at 
the base. 64 
Order Tetra-Decagynia. Styles or sessile stigmas 4-10. 
« Styles or sessile stigmas 4- 10, on one compound ovary. 
- 4 -Pod 1-celled, many-seeded : placentae parietal. 
Parnassia. Stigmas 4, sessile. Sterile stam. clustered at the base 
of the fertile. 50 
