NAIAD ACE JE. 
[Halophila. 
394 
nous, obtuse, longer than the short petioles ; blade ligulate, pale green, 
membranous, denticulate, 1-2 inches long, T \~l in* broad, with a dis- 
tinct midrib and submarginal nerve. Flowers not seen. Thalassia 
stipulacea, Konig ; Kunth , Enum. iii. 120. 
Gathered on the shores of Mauritius by Col. Pike, and of Rodriguez, by Dr. 
Balfour. Australia to Africa. 
Order CIII. TYPHACE^. 
Flowers monoicous, in globose or cylindrical heads, the male heads 
uppermost. Perianth of minute capillary or membranous scales. 
Stamens 2 or many ; filaments subulate, free, or monadelphous ; anthers 
2-celled, basifixed. Ovary usually 1-celled, sessile or stalked ; ovule 
solitary, pendulous from the apex; style simple; stigma oblique. 
Fruit dehiscent or indehiscent. Seed albuminous. — Swamp plants, 
with abundant densely packed small flowers and narrow persistent 
leaves. Distrib. Cosmopolitan. Species 10-12. 
1. TYPHA, Linn. 
Spikes cylindrical, usually one male and one female. Perianth of 
the male of two or three brown subulate scales ; filaments short, mona- 
delphous ; anthers ligulate, 2^ in a bundle, crested by the produced 
brown connective. Ovaries stalked, mostly imperfect, with a perianth 
of dense white silky threads like a pappus ; style produced ; stigma 
lanceolate, oblique. Fruit minute, with a hyaline pericarp. — Gregarious 
swamp-loving perennials, with grass-like leaves and tall stems. 
Distrib. Cosmopolitan. Species 6-8. 
1. T. angustata, Borg and Chaub. ; JRohrb. in V erhand. Bot. Verein 
Brand. 1869, 87. Stems 6-8 feet long. Leaves nearly or quite as 
long as the stem, bright green, sheathing it for the lower foot or more, 
in. broad after they leave it, nearly flat on the face, rounded on 
the back. Female spikes rarely two, varying from 3 inches to a foot 
in length. Brown stigmas just protruding from the hairs, which be- 
fore they become detached are in. long. Male spike as long as 
the female, with a space of about an inch between them. Anthers T * T 
in. long, 2-4 in a bundle. T. angustifolia, Bojer, Sort. Maur. 357. 
Mauritius and Seychelles, everywhere common in marshes. Warmer regions of 
the Old World. Vowndre. 
