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INTRODUCTION TO BOTANY. 139
Hypochilimn. The lower part of the labellum.
Spur, Calcar. A hollow spur formed by an elongation
of the labellum.
Perule.
Perula. A hollow part, often resembling a spur, formed
of two elongated and soldered sepales. Orchideae.
STAMENS.
Chives, Attire, Stamina,—stemon. The male organ of the
plant, usually placed next within the corolla^ and immediately
surrounding the pistill.
1. Origin.
Hypogynous, Stami?ia hypogyna, receplaculo inserta.
Exserted from the receptacle, either below the ovarj', or
even with its bottom. Graminese, Cruciferse, Ranuncu-
laceae.
Perigynous, perigyna, calyci inserta. Exserted from the
internal surface of the floral integument, above the part
where it is detached from the ovary. Thymeleae, Rosaceae,
LeguminosaB, Myrtacese.
Epigynous, epigyna, pistillo inserta. Exserted from the
pistill itself. Arislolochia, UmbelliferEe.
% Immediate, immediata. Exserted from the receptacle,
calyx, or pistill. Cruciferse, Rosaceae, Umbelliferse.
Mediate, mediata, epipetala. Exserted from the co-
rolla, and therefore judged to have the same insertion in
respect to the ovary as the corolla itself. Labiatae, Campanulaceae,
Compositse.
2. Number.
Definite, Stamina definita. The number constant and
not exceeding twelve. 1 Hippuris, 2 Syringa, 3 Iris,
4 Plantago, 5 Lonicera, 6 Lilium, 7 iEsculus, 8 Fuchsia,
9 Butomus, 10 Saxifraga, II not yet discovered, 12 Ha-
lesia.
Indefinite, indejinita. More than twelve, and not usually
counted, or constant. Papaver^ Ranunculus, Rosa.
3. Connexion.
Distinct, Stamina distincta, discreta. Not united together
either by their filaments, or their anthers. Lilium, Ranunculus.