- Spadix of Arum niaculatum from which the greater part of the spathe has been cut away.
H, With spadix branched (Cordy- B, Type of Tubularia.
G, With spadix prolonged e.1, Endoderm-lamella.
41, F, G, H), and consists of the spadix bearing the gonads covered by a single layer of ectoderm (ex.), with or without the addition of an ectotheca.
Sporosac springing from m, a modified hydriform person (blastostyle): the genitalia are seen surrounding the spadix or manubrium.
The spadix forms a gelatinous cyst, the so-called acrocyst (ac), external to the gonotheca (gth), enclosing and protecting the embryos.
In B the spadix of the upper bud has protruded itself through the top of the gonoat the base of the theca and the acrocyst (ac) is secreted round it.
These are followed by the inflorescence, a fleshy spadix bearing in the lower part numerous closely crowded simple unisexual flowers and continued above into a purplish or yellowish appendage; the spadix is enveloped by a leafy spathe, constricted in the lower part to form a chamber, in which are the flowers.
It is often associated with that form of inflorescence termed the spadix, and may be coloured, as in Anthuriuzn, or white, as in arum lily (Richardia aethiopica).
When the spadix is compound or branching, as in palms, there are smaller spathes, surrounding separate parts of the inflorescence.
- Spadix of Arum maculatum.
15), a compound spike, as in rye-grass, a compound spadix, as in some palms, and a compound capitulum, as in the hen-and-chickens daisy.
(Spadix) Arum, some Palms. (Strobilus), Hop.
Compound Spadix, Palms. c. Compound Raceme, Astilbe.
The endodermal spadix (sp) of the sporosac represents the endoderm of the manubrium; the ectodermal lining of the sporosac (ex.) represents the ex-umbral ectoderm of the medusa; and the intervening layers, together with the sub-umbral cavity, have disappeared.