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198 INTRODUCTION TO BOTANY. Mid.dle-valved, medivalue, mediis valvis adnatum. Fixed along the middle line of the valves. Lathrsa, Parnassja. Suturalj ohsuturale, mturcB applicatum. Applied over against the sutures. Asclepias, Argemone. Marginal, marglnale. Fixed solidly either to the edges of the valves, or of the partitions when these latter are not themselves formed of an enlarged placentarium. CEnothera, Leguminosas. Fartitiojial, septlle. Fixed to the partitions. Ruellia, Helianthemum mutabilej Papaver, CEnothera. Fastened, adnatiwi. ' Fixed throughout their v/hoie length, either to the internal surface of the pericarpial ca- vit;/, Orchidese, Ladir^a; or to the edges of the partitions, Tulipa; or the central axis, Ixia Chinensis; or the edges of the valves, Viola. Free, liherimi. Totally detached from the pericarp, and not adhering to an%part when it opens. Plantaginess. % Two-parted, bipartiium. Divided into two branches. Ribes, Bixa Orellana. Three-parted, iripartilum. Orchidese, Passiflora. Four- parted, quadripart'ilum. Parnassia palustris. Five-parted, quinijuepurtiium. Argemone Mexicana. Many-parted, midlipartiLum. 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 portulacea3. 51 Two-parting, hipartihile. Splitting, when ripe, into two seed-bearing portions, which remain fixed, either to the edges of the valves, Leguminosae ; or to the partitions, Rueliia. Three-parting, tripariilnle. Splitting when ripe into' three seed-bearing portions, which remain attached to the edge of the partitions. Lilium, Koeireuteria. Four-parting, &c. Remaining, persis/ens. Not splitting when ripe, but remaining whole. Digitalis, Polemonium, Rhododendrum, Swietenia Mahogani. 51 One-ribbed, unmerve. Two-ribbed, hlnerve. Three-ribbed, trinerve. Many-ribbed, mult'merve. The position of the placentarium maybe discovered in dry pericarps when the seeds are loose, or have even been
INTRODUCTIO^f TO BOTANY. 199 taken out, by the scar or hollow in the panninterne, as that covering is always interrupted at the place where the placentarium is connected with the sarcocarp to which it is always united. Ribs of the placentarium Collected, Nervi colligaii Collected into a single mass by cellular tissue. Lilium, Rhododendruni, Silene. Distinct, distincti. Forming separate cords. Portulaca. Intervalvular, hiiervalves. Placed in the sutures between the valves. Cruciferse. Axile, circumaxiles. Surrounding a central axis which separates when the fruit splits open. Epilobium, CEno- thera. Umbilical Cord. Funiculus, Funiculus umbilicalis, Poclospermium. A vascular cord, that fasteris the seeds to thg pericarpium. Threadlike, FuniculusfiUformis . Cheiranthus, Alyssum campestre, Ribes spinosum glabium. Cassia Fistula. Hooked, uncinatus. Acanthus, Ruellia, Justicia, Bar- leria. .Pappus-like, pappiformis. Formed of silky threads united into a pappus. Asclepias Syriaca, A. nigra. PI. 17, fig. 12. Cells. Loculi, Loculamenta, Thecse. The hollow spaces in the pericarpium formed hy the doubling of the paiininlerne. CoouE. Coccum. yl cell that opens elasticall?/ by a 7nemhranaceous spring, placed at the bottom. Euphorbiaceee. Retinacles. Retinaculae. Crooked points growing from the placentarium, close to the seeds, hut not serving to support them. Acanthacese. PI. 16, fig. 21. Pannexterne. Pannexterna, Epicarpium. The external skin of the epicarpium. Panninterne. Panninterna, Endocarpium. The internal skin of the pericarpium, which in celledfruits forms the partitions by its doublings. .
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INTRODUCTIO^f TO BOTANY. 199<br />
taken out, by the scar or hollow in the panninterne, as that<br />
covering is always interrupted at the place where the placentarium<br />
is connected with the sarcocarp to which it is<br />
always united.<br />
Ribs of the placentarium<br />
Collected, Nervi colligaii Collected into a single mass<br />
by cellular tissue. Lilium, Rhododendruni, Silene.<br />
Distinct, distincti. Forming separate cords. Portulaca.<br />
Intervalvular, hiiervalves. Placed in the sutures between<br />
the valves. Cruciferse.<br />
Axile, circumaxiles. Surrounding a central axis which<br />
separates when the fruit splits open. Epilobium, CEno-<br />
thera.<br />
Umbilical Cord.<br />
Funiculus, Funiculus umbilicalis, Poclospermium. A<br />
vascular cord, that fasteris the seeds to thg pericarpium.<br />
Threadlike, FuniculusfiUformis . Cheiranthus, Alyssum<br />
campestre, Ribes spinosum glabium. Cassia Fistula.<br />
Hooked, uncinatus. Acanthus, Ruellia, Justicia, Bar-<br />
leria.<br />
.Pappus-like, pappiformis. Formed of silky threads<br />
united into a pappus. Asclepias Syriaca, A. nigra. PI. 17,<br />
fig. 12.<br />
Cells.<br />
Loculi, Loculamenta, Thecse. The hollow spaces in the<br />
pericarpium formed hy the doubling of the paiininlerne.<br />
CoouE.<br />
Coccum. yl cell that opens elasticall?/ by a 7nemhranaceous<br />
spring, placed at the bottom. Euphorbiaceee.<br />
Retinacles.<br />
Retinaculae. Crooked points growing from the placentarium,<br />
close to the seeds, hut not serving to support them.<br />
Acanthacese. PI. 16, fig. 21.<br />
Pannexterne.<br />
Pannexterna, Epicarpium. The external skin of the<br />
epicarpium.<br />
Panninterne.<br />
Panninterna, Endocarpium. The internal skin of the<br />
pericarpium, which in celledfruits forms the partitions by its<br />
doublings.<br />
.