198 INTRODUCTION TO BOTANY. 
MWiddle-valved, medivalve, mediis valvis adnatum. Fixed 
along the middie line of the valves. . Lathreea, Parnassia. 
Sutural, oblsuturale, suture applicatum. Applied over 
against the sutures. Asclepias, Argemone. 
Marginal, marginale. . Fixed solidly either to the edges 
of the valves, or of the partitions when these latter are not 
themselves formed of an enlarged Lonnie nis en Cino- 
thera, Leguminoseze. 
Partitional, septile. Mixed to the panna Ruellia, 
Helianthemum mutabile, | Papaver, Ginothera. 
Fastened;  adnatuni. Vixed throughout their whole 
length, either to the internal surface of the per icarpial ca- 
vity, Orchideze, Lathrea; or to the edges of the partitions, 
Tile or the central axis, Ixia Chinensis; ; or the edges 
of the valves, Viela. 
oe iiberum. ‘Totally detached from the pericarp, and 
not adhering to any, part when it opens. Plantaginee. 
«|, Dwe-parted, bipartilum. Divided into td branches. 
Rives, Bixa Orellana. 
Lhree-parted, dripartium. Orchideee, Passiflora. 
}our- parted, ‘quadr ipartiuium.  Parnassia palustris. 
Five-parted, quinguepartitum. Argemone Mexicana. 
Many- -parted, mullipartitum.  Papaver, Punica.—These 
divisions of the placentarium are usually fastened to the 
sides of the pericarpial cavity, but sometimes they are only 
attached to the pericarpium by their extremities, as in the 
portulacez. 
q ‘Two-parting, bipartibile. Splitting, when ripe, into 
two seed-bearing portions, which remain fixed, either to 
the edges of the valves, Leguminose; or to the partitions, 
Ruellia. 
Three-parting, tipartilile. \ Splitting when ripe into’ 
three seed- bearing portions, which remain attached to the 
edge of the partitions. Lilium, Koelreuteria. 
_ Four-parting, &e. 
Remaining, persistens. Not splitting when ripe, but re- 
maining whole, Digitalis, Polemonium, Rhododendrum, 
Swietenia Mahogani. 
{| One-ribbed, uninerve. 
Two-ribbed, Linerve. 
Taree peed trinerve. 
-Many-ribbed, multinerve. 
The: position of the placentarium may be discovered in 
dry pericarps when the seeds are loose, or have even been 
