The Manual of the Botany of the Northern United States Part 10

One to three, always fewer than the corolla-lobes.

VALERIANACEae, 228

Four or five; leaves opposite or whorled.

Ovary 1-celled; flowers in a dense involucrate head.

DIPSACEae, 229

Ovary 2--5-celled.

Leaves whorled and without stipules. RUBIACEae, 222

Leaves opposite or whorled, and with stipules. RUBIACEae, 222

Leaves opposite without stipules (petioles sometimes with stipule-like appendages). CAPRIFOLIACEae, 216

[2.] _Ovary free from the calyx (superior)._

[*] _Corolla irregular; stamens (with anthers) 4 and didynamous, or only 2._

Ovules and seeds solitary in the (1--4) cells.

Ovary 4-lobed, the style rising from between the lobes.

l.a.b.i.aTae, 403

Ovary not lobed, the style from its apex. VERBENACEae, 401

Ovules numerous or at least as many as 2 in each cell.

Ovary and pod 1-celled,

With a free central placenta; stamens 2. LENTIBULACEae, 395

With 2 or more parietal very many-seeded placentae; stamens 4.

OROBANCHACEae, 393

Ovary and fruit more or less 4--5-celled. PEDALIACEae, 399

Ovary and pod 2-celled, but the 2 placentae parietal.

BIGNONIACEae, 398

Ovary and pod 2-celled; placentae in the axis.

Seeds rarely few, not on hooks, with alb.u.men.

SCROPHULARIACEae, 377

Seeds few, borne on hook-like or other projections of the placentae; no alb.u.men. ACANTHACEae, 399

[*][*] _Corolla somewhat irregular; stamens (with anthers) 5._

Stamens free from the corolla; anthers with their cells opening by a hole or c.h.i.n.k at the top. Rhododendron, in ERICACEae, 320

Stamens inserted on the corolla.

Ovary deeply 4-lobed around the style. Echium, in BORRAGINACEae, 367

Ovary not lobed; pod many-seeded.

Filaments or some of them woolly. Verbasc.u.m, SCROPHULARIACEae, 379

Filaments not woolly. Hyoscyamus, SOLANACEae, 376

[*][*][*] _Corolla regular._

[+] _Stamens as many as the lobes of the corolla._

Ovaries 2, separate; their

Styles and stigmas also wholly separate.

Dichondra, CONVOLVULACEae, 368

Stigmas and sometimes styles united into one.

Filaments distinct; pollen in ordinary grains. APOCYNACEae, 337

Filaments monadelphous; pollen in ma.s.ses. ASCLEPIADACEae, 338

Ovary one, but deeply 4-lobed around the style (or 2-lobed in Heliotropium).

Leaves alternate. BORRAGINACEae, 360

Leaves opposite. Mentha, in l.a.b.i.aTae, 407

Ovary one; pod 2-lobed or 2-horned at the summit. LOGANIACEae, 345

Ovary one; not deeply lobed,

One-celled, one-ovuled, becoming an achene. PLANTAGINACEae, 422

One-celled, with ovules parietal or on 2 parietal placentae.

Leaves (or in Menyanthes three leaflets) entire. GENTIANACEae, 346

Leaves toothed, lobed, or pinnately compound. HYDROPHYLLACEae, 357

Two- to ten-celled.

Leafless parasitic twining plants. Cuscuta, in CONVOLVULACEae, 370