I40 KEY TO NATURAL ORDERS. [chap. 



corolla-lobes. Ovary four-celled, entire with one ovule in, 

 each cell. Style one, terminal. 



JMvRSiNACE.^ (p. 260). — Trees or shrubs, with alternate 

 often glandular-dotted entire leaves, and regular flowers. 

 Stamens as many as corolla-lobes, and opposite to them. 

 Ovary one-celled, with a free central placenta. Seeds one 

 or more. 



Primulace^e (p. 261), — Herbs, with radical or alternate 

 leaves. Flowers regular. Stamens as many as corolla-lobes, 

 and opposite to them. Ovary one-celled, with a free central 

 placenta. Style one. Seeds indefinite. 



Plumbaginace/E (p. 263). — Herbs or shrubs with radical 

 or alternate leaves. Flowers regular. Stamens as many as 

 corolla-lobes (often nearly free to the base), and opposite to 

 them. Ovary one-celled, with a solitary ovule suspended 

 from a slender funicle. Styles five. 



Plantaginace/E (p. 264). — Herbs with radical or rarely 

 cauline leaves, and small greenish or scarious, regular, often 

 spicate flowers. Sepals four. Stamens four, exserted, and 

 alternate with corolla-lobos. Style simple. 



INCOMPLETiE.— Perianth simple or none (double in 

 some Euphorbiaceae). 



Nyctaginace^ (p. 265).— Herbs, shrubs, or trees with 

 alternate or opposite (unequal) leaves. Flowers regular, 

 hermaphrodite, usually coloured ; base of the periantli per- 

 sistent, closely investing the superior one-celled, one-seeded 

 nut. Seed albuminous, with a curved embryo. 



Chenopodiace/e (p. 266). — Usually herbs with alternate 

 or opposite exstipulate leaves and minute herbaceous her- 



