An Illustrated Flora of the Northern United States, Canada and the British Possessions/Convallariaceae
Handb. 1: 184.
Scapose or leafy-stemmed herbs, with simple or branched rootstocks, never with bulbs or corms. Flowers solitary, racemose, panicled or umbelled, regular and perfect. Leaves broad, parallel-veined and sometimes with cross-veinlets, alternate, verticillate or basal, or in Asparagus and its allies reduced to scales bearing filiform or flattened branchlets in their axils. Perianth inferior, 4-6-parted with separate segments, or oblong, cylindric or urn-shaped and 6-lobed or 6-toothed. Stamens 6, rarely 4, hypogynous or borne on the perianth; anthers introrsely, extrorsely or laterally dehiscent. Ovary 2~3-celled, superior; ovules anatropous or amphitropous; style slender or short; stigma mostly 3-lobed. Fruit a fleshy berry, rarely a capsule. Seeds few or numerous. Embryo small.
About 23 genera and 215 species, widely distributed.
|•||Leaves reduced to scales ; leaf-like bractlets filiform.||1.||Asparagus.|
|•||Leaves broad; stems simple or somewhat branched.|
|•||Leaves basal; flowers umbelled or solitary.||2.||Clintonia.|
|•||Leaves alternate (solitary in flowerless plants of no. 4).|
|•||Flowers racemed, umbelled, panicled or solitary, terminal.|
|•||Flowers racemed or panicled.|
|•||Flowers umbelled or solitary.|
|•||Fruit a berry.||5.||Disporum.|
|•||Fruit a capsule.||6.||Uvularia.|
|•||Flowers solitary or two together, axillary.||7.||Streptopus.|
|•||Perianth cylindric or oblong, 6-toothed.||8.||Polygonatum.|
|•||Leaves nearly basal; flowers racemed; perianth 6-toothed.||9.||Convallana.|