290 
APETALOUS ORDERS. 
Fig. 211. 
ous, imbricated in aestivation. Stamens 6, inserted into the 
tube of the perianth ; anthers introrse. Ovary 3-celled ; styU 
single ; stigma 3-lobed or entire, often twisted. Fruit capsular 
or succulent, 3-celled. Seeds numerous, albuminous; emhryo 
minute. (See Plate Y., Fig. 3.) 
a. Properties : fruit more or less acid in the "wild state, but -when cultivated 't 
becomes sweet and highly aromatic. 
Geneha. — Bromelia, Tillandsia. 
546. H^MODORACE^, the Blood-root 
Trihe. — Herbaceous plants with fibrous 
roots. Leaves equitant, distichous, en- 
siform, -and with the stems and flow- 
ers more or less woolly. Perianth 
petaloid, 6-cleft, regular. Stamens 3 or 
6, inserted on the perianth; anthers 
introrse. Ovary 3-celled, adherent. 
Fruit a 3-valved capsule. Seeds defi- 
nite or numerous ; embryo in cartilagi- 
nous albumen. 
Genera. — Dilatris, Metris. 
Fig. 211, a, farinosa ; b, tubular perianth; 
e, the same spread open, showing the stamens. 
Iridacej^, the Iris Tribe, — Herbaceous plants with tu- 
berous or fibrous roots. Leaves ses- 
sile, alternate, equitant, compressed, 
ensiform. Flowers with spathas. 
Perianth 6-parted, 3 internal, 3 ex- 
ternal. Stamens 3. Ovary 3-celled ; 
style 1 ; stigmas 3, often petaloid. 
Cajpsule 3-celled, 3-valved, many- 
seeded. Seeds numerous ; embryo in- 
closed in hard albumen. (See Plate 
VI, Fig. e.) 
Genera, — Sisyrinchium, Iris, Tigridia, Gladio- 
lus, Ixia, Crocus. 
Fig. 212, diagram of an Iris showing the 6 
divisions of the perianth ; 6, exterior divisions ; 
e, interior divisions of the colored perianth of 
Iri3 germanica ; d, ripe capsule ; e transverse 
section of the ovary. 
548. DioscoRACEJE, the Yam Tribe. 
• — Twining shrubs with large tubers. 
Leaves alternate, occasionally oppo 
site, with reticulated veins. Floivers 
inconspicuous, dioecious. Perianth 
adherent to the ovary, 6-parted in 2 series. Stamens 6. Ovary 
3-celled ovules 1 or 2 in each cell ; styles and btigmas nearlj? 
Fig. 212. 
