CLASS IV. ORDER I. 
37 
"the calyx, the upper one membranaceous ; perfect floret with cartilaginous 
valves, unarmed, (cockfoot-grass, panic-grass.) 
[In spikes.] 
Hor'^deum. Spikelets 3 at each joint of the rachis, 1 or 2-flo\vered, all: perfect, 
or the lateral ones abortive ; glume lateral, subulate; perfect flower with a 2- 
valved corolla ; lower valve ending in a bristle; seed coated, (barley.) Ex, 
ORDER III. TRIGYNIA. 
Molluu'go. Calyx 5-leaved, coloured within; corolla 0; capsule 3-celled, 3- 
valved. (carpet- weed.) 
Puoserpina'ca. Calyx 3-parted, superior ; corolla 0 ; fruit a hard nut, 3-sided, 
3- seeded, crowned by the calyx, (mermaid-weed.) 
CLASS IV. TETRANDRIA. 
ORDER I. MONOGYNIA. 
A. Flowers superior, [l-petalled.] 
Allio'nia. Common calyx oblong, simple, 3-flowered; proper calyx obsolete ; 
corolla irregular ; receptacle naked. 
Ckphalan'^thus. Inflorescence in ahead; general calyx none; proper calyx- ' 
superior, minute, angular, 4-cleft ; corolla funnel-form; receptacle globular, 
hairy ; capsule 2 to 4-celled ; seed solitary, oblong, (button-bush.) 
Dip'^SACus. Flowers in an ovate or roundish head ; common calyx polyphl- 
lous, foliaceous; proper calyx monophyllous, superior; corolla tubular, 4-cleft; 
seed solitary, receptacle, conic, chaffy, (teasel.) 
Ga'lium. Calyx 4-toothed ; corolla flat, 4-cleft; fruit dry; seeds 2, roundish ; 
leaves stellate, (bedstraw.) 
Ru'bia. Calyx small, 4-toothed, superior. Corolla bell-form. Filaments 
shorter than the corolla. Fruit pulpy, (madder.) 
Scabio'sa. Involucre many-leaved. Calyx double, superior. Corolla tubular. Fil- 
aments longer than the limb of the corolla. Seed naked, crowned by the calyx. 
Dio'dia. Calyx with the tube ovate, 2 or 4-toolhed. Corolla funnel-form, 
4- lobed. Capsule ovale, 2-celled. 
Hedyo'tis. Calyx 4-toothed. Corolla tubular, bearded at the throat, 4-parted. 
Capsule ovate, 2-celled, many-seeded. 
Housto'nia. Calyx 4-tooihed. Corolla salver-form, 4-cleft ; capsule 2-celled, 
many-seeded, opening transversely. (Innocence.) 
Mitchel''''la. Calyx 4-toothed; corollas 2 on each germ, funnel-form; tube 
cylindric ; limb 4-parted, spreading, villose on the inside; stamens scarcely ex- 
sert ; stigma 4-cleft ; berry double, 4-seeded. (partridge-berry.) 
Linn.e'a. Calyx doable; that of the fruit 2-leaved, inferior; that of the stig- 
ma globose ; berry 3-celled, dry. (twin-flower.) 
.Cor/'nus. Calyx 4-toothed; drupe with a 2-celled nut. Some species have a 
4-leaved involucrum. (dogwood, false box.) 
Ludwi'gia. Calyx 4-parted, persistent; corolla sometimes 3; capsule quad- 
rangular, 4-celled, inferior, many-seeded. 
B. Flowers inferior. 
Planta'go. Calyx 4-cleft; corolla 4-cleft, reflex; capsule 2-celled opening 
transversely; stamens exsert very long, (plantain, ribwort.) 
Centaurrl'la. Calyx 4-parted; corolla sub-companulate, segments somewhat 
erect ; stigma thick ; capsule I-celled, 2-valved, many-seeded, surrounded by 
the persistent calyx and corolla. 
Ex'acum. Calyx deeply 4-parted; corolla 4-cleft, tube globose ; capsule bisiv 
late, 2-celled, many-seeded. 
SwER^TiA. Calyx flat, 4 or 5-parted ; corolla 4 or 5-parted ; tube short ; bor- 
der spreading, with 2 pores at the base of each ; style short ; stigma 2 ; capsule 
1-celled, 2-valved. 
Fra'sera. Calyx deeply 4-parted; corolla 4-parted, spreading segments oval 
with a bearded orbicular gland in the middle of each ; capsule compressed, part- 
ly marginate, 1-celled; seeds few, large, imbricate, with a membranous margin. 
Ly'cium. Corolla tubular, having the throat closed by the beards of the fila- 
•ments; stamens often 5; berry 2-celled, many-seeded, (matrimony.) 
Icto'des. General calyx a spatha ; spadix simple, covered with flowers ; peri- 
