kk) Sepals imbricate; leaves not tailed at the base; ovary long-beaked. =Geraniaceæ= kkk) Sepals imbricate; leaves not tailed; ovary not beaked. l) Petals not contorted: =Molluginaceæ= ll) Petals contorted: =Linaceæ= jj) Flowers unisexual; disk present or obscure. =Euphorbiaceæ= =GROUP 11. 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 present, more or less united.= a) Stamens the same number as and opposite to the corolla lobes: b) Ovules solitary in the whole ovary or in each cell of the ovary; style often lobed: c) Trees or shrubs, often with hard wood: d) Petals imbricate; hairs often stellate or medifixed; staminodes often present, sometimes petaloid. =Sapotaceæ= dd) Petals valvate; hairs usually simple; usually no staminodes: e) Inflorescence not leaf-opposed; leaves simple, without tendrils. =Olacaceæ= ee) Inflorescence leaf-opposed; leaves often compound; mostly climbers with tendrils. =Ampelidaceæ= cc) Herbs or climbers: d) Corolla lobes valvate; tendrils often present; inflorescence usually cymose-paniculate, leaf-opposed; leaves usually with the stipules adnate to the petiole; petals united at the base. =Ampelidaceæ= dd) Corolla lobes imbricate; no tendrils; inflorescence more or less corymbose; petals united high up. =Plumbaginaceæ= bb) Ovules 2 or more in each cell; style undivided; placentas basal: c) Trees or shrubs often with gland-dotted simple leaves; leaves exstipulate. =Myrsinaceæ= cc) Herbs or climbers usually with compound stipulate leaves and leaf-opposed inflorescence. =Ampelidaceæ= ccc) Herbs with opposite simple leaves and solitary or axillary scarlet, blue or rose flowers; leaves not gland-dotted, exstipulate. =Primulaceæ= aa) Stamens the same number as the corolla-lobes and alternate with them, or more numerous or fewer: b) Stamens more than twice as many as the corolla lobes; flowers unisexual; corolla lobes about 5; leaves stipulate. =Euphorbiaceæ=