INTRODUCTION TO BOTANY. 101 
virens, Juncus: but Link and others with more propriety: 
restrict the term perigonium to those single integuments of 
flowers whose appearance renders it doubtful whether they 
ought to be considered either as a calyx or corolla, or as 
a union of the two soldered together, the inner surface 
having the characters of a corolla, and the outer of a calyx: 
and as to the others, they consider them either as calyces 
or corollee, according to circumstances. 
Receptacle of the flower, Seat of the flower, Receptacu- 
lum floris, Sedes floris, Torus,—clinium,—thalamum. That 
part of the flower on which the sexual organs and corolla 
are placed, and which is surrounded by the calyx; being 
an enlargement of the peduncle. Pl. 10, fig.4e; 6f; 
pl. 11, fig. 12 a. 
Nectary, Nectarium. Glandular organs which in some 
flowers are situated on the receptacle, or base of the pistil, 
and secrete peculiar juices. Menyanthes nymphoides, Scro- 
phularia sambucifolia, Scutellaria alpina. PI. 11, fig. 5, 
4, 12 b. 
q Flowret, Flosculus. A small flower considered as part 
of a larger compound flower. Umbelliferee, Composite. 
15. Modes of Composition. 
In catkins, amentaceous, Flores amentacei, in julos col- 
lecti. Disposed on bracteze on a common axis. Betula, 
Salix, Pinus, Quercus. PI. 7, fig. 5 and 6; pl. 10, fig 18. 
Spiked, spicatz. Sessile on a common axis. Triticum, 
Chenopodium spinacifolium, Plantago.. PI.7, fig.3; pl. 8, 
fig. 1. 
Peiiekcd. in bunches, racemosz. On single-flowered pe- 
dicells upon a common axis. Ribes rubrum, Cerasus ra- 
cemosa, Borago officinalis. Pl. 8, fig. 6. 
In panicles, paniculate, paniculati, yubati. On branched 
pedicells upon a common axis. Avena sativa, Juncus acu- 
tus. PI. 8, fig. 7. rae 
In thyrses, in thyrsos collecti. Ina close, oval panicle. 
Syringa vulgaris. Pl. 7, fig. 4. 
Irregularly wmbelled, corymbose, corymbost. In umbels 
whose peduncles are irregularly branched. ‘Achillea mille- 
folia, Cardamine pratensis, Iberis umbellata. PI. 7, fig. 2. 
Cymose, cymosi. In umbels whose peduncles are branched 
twice, and irregularly. Sambucus niger, S. humilis, Cornus. 
sanguinea, PI. 7, fig. 8. . 
