49. CONVOLVULACEÆ.--Herbs, generally twining, with alternate, simple leaves (sometimes absent); and mostly conspicuous, regular flowers. Sepals, petals, and stamens 4 or 5. Ovary two-or four-celled. Fruit a four-seeded capsule. (The Bindweed Family.) 50. SOLANACEÆ.--Herbs or shrubs with alternate leaves, and axillary cymes of regular flowers. Sepals, petals, and stamens 5. Ovary two-celled. Fruit berry-like or a capsule, many seeded. (The Nightshade Family.) 51. SCROPHULARIACEÆ.--Herbs with mostly irregular, lipped flowers. Sepals and petals 4 or 5. Stamens 2, or 4, two longer than the others. Carpels 2. Fruit a many-seeded capsule. (The Figwort Family.) 52. OROBANCHACEÆ.--Fleshy, brown, parasitic plants, with scattered scale-leaves; and mostly brownish, irregular flowers. Sepals 4 or 5. Petals 5, lipped. Stamens 4, two longer than the others. Carpels 2. Fruit a one-chambered, many-seeded capsule. (The Broom-rape Family.) 53. VERBENACEÆ.--An erect, branched herb, with opposite leaves; and a compound spike of small, irregular flowers. Sepals and petals 5. Corolla lipped. Stamens 4, two longer than the others. Ovary four-celled. Fruit of 4 nutlets. (The Vervain.) 54. LABIATÆ.--Herbs, mostly aromatic, with square stems, opposite leaves, and whorls or cymes of irregular flowers. Sepals and petals 5. Corolla usually lipped. Stamens 4 (rarely 2), two longer than the others. Fruit of 4 one-seeded nutlets. (The Dead Nettle Family.) 55. BORAGINACEÆ.--Herbs, mostly rough, with alternate, simple leaves; and spikes of conspicuous, regular flowers. Sepals, petals, and stamens 5. Carpels 2. Fruit of 4 one-seeded nutlets. (The Borage Family.) 56. LENTIBULARIACEÆ.--Insectivorous, marsh herbs, with radical, entire leaves, or much-divided floating leaves with bladders; and conspicuous, irregular flowers. Sepals and petals 5. Corolla usually lipped. Stamens 2. Fruit a one-chambered, many-seeded capsule. (The Butterwort Family.) 57. PRIMULACEÆ.--Herbs, mostly with radical leaves; and conspicuous, regular flowers. Sepals, petals, and stamens 4 to 9. Stamens opposite the petals. Ovary one-celled, with free central placenta. Fruit a many-seeded capsule. (The Primrose Family.) 58. PLUMBAGINACEÆ.--Herbs, mostly maritime, with radical or alternate leaves; and mostly blue, regular flowers. Sepals, petals, and stamens 5. Stamens opposite the petals, and usually free. Carpels 3 to 5. Ovary one-celled and one-seeded. (The Thrift Family.) 59. PLANTAGINACEÆ.--Herbs with (generally) simple, entire, radical leaves; and spikes of greenish flowers. Sepals, petals, and stamens 4. Corolla scaly. Carpels usually 2 or 4. Fruit a one-to four-chambered capsule. (The Plantain Family.) _Note._--_Plants in which calyx or corolla are, or appear to be, absent occur in orders_ 1, 6, 14, 26, 27, 28, 29, and 32. * * * * *