LINNJEAN ARTIFICIAL ARRANGEMENT. 
lix 
* * Calyx or perianth 6 -parted, all colored alike or nearly so. 
-♦-Achenium inclosed by the 3 inner converging veiny sepals. 
Rumex. Achenium triangular. Outer sepals smaller, spreading. 391 
-»—*-Berry naked, 1 -3-celled, 1 -few-seeded. 
Smilax. Perianth deciduous. Leaves alternate, veiny. 485 
Medeola. Perianth very deciduous. Leaves in 2 whorls. 488 
—•-Pod naked, 3-6-celled, splitting into as many 1-seeded carpels. 
Triglochin. Perianth deciduous, in 2 rows. Stigmas sessile. 458 
-*—'—•—*-Pod naked, 3-celled, often 3-horned, or 3 separate carpels. 
Scheuchzeria. Perianth persistent. Pods separate, 1 - 2 -seeded. 459 
Melanthace^e. Pods united more or less completely into one, sev¬ 
eral-seeded. - 495 
* * * Sepals 3, green, and very different from the 3 petals. 
Trillium. Berry ovate, 3-angular, 3-celled, many seeded. 487 
Order Polygynia. Styles or sessile stigmas numerous. 
Alisma. Sepals 3, green : petals 3. Ovaries many, 1-seeded. 459 
CLASS VII. HEPTABTDRIA. 
Order Monogynia. Style or sessile stigma 1 . 
^Esculus. Petals free from the 5-lobed calyx. Leaves compound. 81 
Lythrum. Petals on the cylindrical 7-toothed calyx. Leaves simple. 132 
Trientalis. Corolla and calyx deeply 7-parted, spreading. 282 
Order Di-Tetragynia. Styles or sessile stigmas 2-4. 
Polygonum. Ovary 1-celled, forming an achenium in fruit. 386 
Ulmus. Ovary 2-celled, forming a flat samara in fruit. 399 
Saururus. Ovaries 3-4, separate. Calyx and corolla none. 401 
Order Polygynia. Styles or sessile stigmas many. 
Echinodorus. Sepals 3 : petals 3. Ovaries crowded in a head. 460 
CLASS VIII. OCTANDRIA. 
Order Monogynia. Style or sessile stigma 1 . 
* Corolla polypetalous, free. 
Jeffersonia. Sepals 4 : petals 8. Pod 1-celled, opening across. 21 
Hypopitys. Sepals and petals each 4-5, fleshy. Pod 4 - 5 -celled. 274 
* * Corolla of 4 petals on the summit of the adherent calyx-tube. 
Rhexia. Anthers opening by terminal pores. Pod 4-celled. 131 
Onagraceje. Anthers opening lengthwise. Pod 4-celled. 134 
* * * Corolla monopetalous, on the adherent calyx. 
Vaccinie^e. Anthers opening by terminal chinks. Berry 4-5-celled. 356 
* * * * Corolla none : calyx petal-like. 
Dirca. Calyx obscurely toothed, bearing the long stamens. 395 
Order Di-Trigynia. Styles or sessile stigmas 2-3. 
Acer. Pod a double samara. Leaves opposite. 80 
Ulmus. Pod a single 1-celled samara. Leaves alternate. 399 
Chrysospi.enium. Pod inversely heart-shaped, many-seeded. “ 151 
Polygonaceje. Pod a 1 -seeded achenium. Leaves alternate. 385 
Order Tetra-Pentagynia. Styles or sessile stigmas 4-5. 
Sedum. Pods separate, as many as the petals. 146 
