GENERA OR FAMILIES. 39 



41. Araceous Plants. ARACE^E. 



(92) Arum flowers densely packed on the lower part of a co- 



lumnar spike (spadix), whish is enclosed in a spathe or 

 leafy sheath. 



42. Iridaceous Plants. IRIDACE^E. 



* Stigmas ^-parted slender, deeply 2-cleft. 



(93) Trichonema perianth with a very short tube, and a limb 



of six deep equal segments. 



** Stigmas ^-parted ; segments widening upwards, convolute. 



(94) Crocus perianth with a slender tube, which is twice as long 



as the six-parted equal limb. 



43. Amaryllidaceous Plants. AMARYLLIDACEJS. 



* Perianth with a cup-shaped coronet or crown in the mouth 



of its tube. 



(95) Narcissus perianth tubular at the base, the six-parted 



limb spreading. 



** Perianth without a coronet. 



(96) Galanthus perianth divided to the base, the three outer 



segments larger than the three inner. 



(97) Leucojum perianth divided to the base, the six segments 



equal. 



44. Orchidaceous Plants. ORCHIDACE^. 



* Plants scaly, leafless, brownish ; (pollen simple or in 



slightly cohering granules.) 



(98) Neottia flowers small ; lip spurless, two- cleft, longer than 



the sepals. 



