160 FLORA OF SOUTH AUSTRALIA 
ORDER CYCADEAE. 
Encephalartos. 
Leaves simple-pinnate, leaflets numerous, flat, 10- to 12- 
nerved ; cone-scales large, cordate-reniform, pointed, 
glabrous... “e Me ate me ‘as ..» MacDonnelli 
CLASS II.—MONOCOTYLEDONS. 
Sub-Class I.—Florideae Perigynae. 
ORDER HYDROCHARIDEAE. 
Ottelia. 
Leaves radical on long stalks, the /amina oval or oblong, float- 
ing; flowers bisexual, large, solitary on long scapes, 
within a tubular 2-lobed wingless spathe ; petals white, 
3; stamens 6; stigmas 6, 2-lobed ... “na an ze 
Vallisneria. 
Leaves radical, elongated, partially or wholly submerged, 
without lamina; flowers unisexual; female flower soli- 
tary, within a narrow tubular 3-toothed spathe, on a long 
spiral scape ; petals 0; stigmas 3 = hs 
Blyxa. 
Leaves long, grass-like, entire; male flowers within a tubu- 
lar 2-toothed spathe, stamens 8 ; female flowers solitary 
within a long and slender spathe; petals present... 
Hydrilla. 
Leaves oblong-lanceolate, whorled along submerged much- 
branched stems ; female flowers sessile, axillary, solitary, 
within a short tubular spathe ; stigmas 3 ; petals present 
Halophila. 
Marine, leaves oval, long-stalked, submerged ; female flowers 
singly sessile ; stamens and stigmas 3; petals 0; flowers 
between distinct bracts asi a 
ORDER ORCHIDEAE. 
Leaves reduced to scales. Root of rhizome-like tubers. 
Pollen masses waxy, attached to two stipule-like 
processes. Parasitic on roots 
Epiphytal. Stemsenlarged into pseudo-bulbs. Pollen 
ovalifolia 
spiralis 
Roxburghii 
verticillata 
ovalis 
Dipodium 
masses waxy, sessileona gland... te .. Cymbidium 
