624 SYNOPTICAL KEY 
96 Liliacew Stems from bulbs, corms or rhizomes: anthers 2-celled: 
fruit a loculicidal or septicidal capsule: embryo in copious albumen. 
97 Convalariaceze Leafy-stemmed herbs from rootstocks: anthers 
2-celled: fruit a fleshy berry: embryo small in copious albumen. 
98 Melanthacex Leafy-stemmed plants with rootstocks or bulbs: anth” 
ers 2-celled: fruit a 3-celled septicidal or loculicidal capsule: seeds 
usually with tails or appendages. 
99 Pontederiacex Herbaceous aquatic plants with spathaceous tubular 
flowers: ours with grass-like leaves, solitary axillary flowers and 
1-celled 3-valved capsules. 
100 Araceze Ours acaulescent herbs with the flowers crowded upon a 
spadix with 4-lobed perianth, 4 stamens, 2-celled anthers and 2-celled 
2-ovuled ovaries which become fleshy and coalescent in fruit. 
* * Aquatic herbs: perianth none: ovary 1-celled, utricular or nut- 
like in fruit: seeds with albumen. 
101 Typhacex Stems solid, terete, with linear leaves and creeping root- 
stock: flowers moncecious, in heads or crowded upon a spadix. 
102 Lemnacex Very small stemless floating plants with disk-like 
fronds and inconspicuous flowers. 
* * * Aquatic or marsh plants: perianth herbaceous or petal-like 
or none: carpels 1-several, distinct or separable: seeds without albumen. 
1038 Valisneriacew Flowers axillary and mostly solitary, with tubular 
perianth: fruit indehiscent. 
104 Naiadacew Perianth of fertile flowers of 4 herbaceous valvate sepals 
or none: carpels 1-6, 1-ovuled. 
105 Scheuchzeriaceew Perianth of 4-6 segments in 2 series: carpels 
3-6, 1-2-ovuled. 
106 Alismacex Perianth-segments 6, distinct, 3 herbaceous 3 petal-like: 
carpels numerous, verticillate or capitate, becoming achenes. 
* * * * Perjanth of 6 equal persistent glumaceous segments; fruit - 
a capsule. 
107 Juneaceex Flowers perfect: capsule loculicidally 3-valved: seeds 
with albumen. 
* * * * * Flowers in the axils of scales or glumes, without evident 
perianth : stamens 1-3: ovary 1-celled, l-ovuled: seeds with albumen. 
108 Cyperacee Stems solid, often triangular, with closed sheaths: 
glume single; perianth represented by bristles, or wanting: anthers 
attached by the base: fruit a spike of lenticular or triangular achenes. 
109 Graminee Stems hollow, terete: sheaths split to the base: glumes 
in pairs: perianth represented by minute scales or none: anthers 
versatile: fruit a caryopsis or grain. 
OrpDER XCIIIT ORCHIDACE Lindl. Nat. Syst. ed. 2, 336. 
Perennial herbs with parallel-veined flat leaves and perfect 
irregular flowers in racemes or spikes, or solitary and terminal. 
Perianth superior, of 6 segments, the 3 outer similar or nearly 
so, 2 of the inner similar, the third inner one, called the lip, 
dissimilar often markedly so, usually larger. Stamens coherent 
wit4 the style, forming an unsymmetrical column, with usually 
