. A dictionary of the flowering plants and ferns. Botany. 538 PRIMULACEAE. Floral diagram of Primula acaulis (after Eichler). as in Myrsinaceae explains the antepetalous position of the sta. as due to the abortion of the originally outer whorl. Much discussion took place on this subject in former times, espe- cially after Pfeffer's discovery of the peculiar development of the corolla from the backs of the sta. (see Eichler, Bliithendiag. or Asa Gray, Struct. Bot. p. 197). Ovary superior or half-inferior (Samolus), syncarpous with free central placenta, typically of 5 cpls., but this is not eas
. A dictionary of the flowering plants and ferns. Botany. 538 PRIMULACEAE. Floral diagram of Primula acaulis (after Eichler). as in Myrsinaceae explains the antepetalous position of the sta. as due to the abortion of the originally outer whorl. Much discussion took place on this subject in former times, espe- cially after Pfeffer's discovery of the peculiar development of the corolla from the backs of the sta. (see Eichler, Bliithendiag. or Asa Gray, Struct. Bot. p. 197). Ovary superior or half-inferior (Samolus), syncarpous with free central placenta, typically of 5 cpls., but this is not easily proved, as no partitions (cf. Caryophyllaceae) are found in the ovary and the style and stigma are simple. The capsule splits into 5 valves, and monstrous fls. with 5 leaves in place of the ovary occur; hence \ve may perhaps assume 5 cpls. Ovules oo, spirally or in whorls on the placenta, semi-anatro- pous. The morphology of the free-central placenta has also been a subject of dispute (see Pax in Nat. Pfl., or Eichler, Bliithendiag.}. A great number of the P. have heterostyled flowers (Primula, Hottonia, Glaux, Androsace, &c., for details). The fruit is a capsule, dehiscing in various ways, but usually by teeth at the tip, one opposite to each sepal. Seeds few or many; embryo small, in fleshy endosperm. Chief genera: Primula, Andro- sace, Soldanella, Hottonia, Samolus, Lysimachia, Trientalis, Glaux, Anagallis, Cyclamen. Primulales. The 2nd order (EP.) of Sympetalae. The 5th order (BH.) of Gamopetalae. Primulina Hance. Gesneriaceae (i). i China. Primulinae (Warming). The 3rd order of Sympetalae. Prince's feather, Amaranthus. Princewood bark (W. I.), Exostemma. Principes. The 5th order of Monocotyledons. Pringlea ;ex Hook. f. Cruciferae (i). P. antiscorbutica R. Br. (Kerguelen cabbage), the only sp., has the habit of a cabbage, with the fls. borne on lat. axes. It grows only "on the tempestuous shores of Kerguelen's I., where winged insects cannot ex
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