=Solanaceæ= ii) Corolla lobes imbricate, without appendages. =Scrophulariaceæ= dd) Flowers zygomorphic: e) Aquatic herbs with bladder-like leaves; stamens 2; anthers 1-celled; sepals 2; ovules on a free basal placenta. =Lentibulariaceæ= ee) Characters not as above: f) Ovary not deeply lobed; style not gynobasic: g) Ovules numerous in the whole ovary or in each cell of the ovary, or if 2 then superposed: h) Leaves pinnately compound; ovules numerous; seeds often winged, without endosperm; shrubs or trees. =Bignoniaceæ= hh) Leaves simple; mostly herbaceous: i) Ovules numerous; ovary 2-celled; seeds usually minute. =Scrophulariaceæ= ii) Ovules 1 to many; ovary 2-4 celled; seeds not on hook-like funicles. =Pedaliaceæ= iii) Ovules few; ovary 2-celled; leaves rarely all radical; seeds on hook-like funicles. =Acanthaceæ= gg) Ovule solitary in each cell of the ovary or if 2 then collateral; herbs, shrubs or trees. =Verbenaceæ= ff) Ovary deeply 4-lobed; style gynobasic; leaves opposite or verticillate; flowers often in whorls; stems usually quadrangular. =Labiatæ= =GROUP 12. One carpel or more than one united carpels; ovules attached to the central axis or to the base or apex of the ovary cell; ovary superior; petals absent.= a) Calyx absent from the hermaphrodite and often from the female flowers: b) Moss-like or hepaticiform aquatic herbs with minute flowers; ovules 2 or more in a 1-celled ovary. =Podostemonaceæ= bb) Above characters not associated: c) Flowers surrounded by an involucre margined by fleshy glands; male flowers several to numerous and each consisting of a single stamen, with a single female flower often stalked in their midst. =Euphorbiaceæ= cc) Flowers not as above: d) Leaves stipulate, stipules sometimes adnate to the petiole: e) Herbs or shrubs; flowers in dense spikes; petioles not dilated and not enclosing the young bud. =Piperaceæ= ee) Trees or shrubs; flowers on a common open receptacle, the fruit becoming immersed in it. =Moraceæ=