146 PATAGONIAN EXPEDITIONS I BOTANY. 



Section II. ANGIOSPERM^:. 



Flowering plants whose carpels become closed ovaries, and are sur- 

 mounted by stigmas which receive the pollen and conduct the growing 

 pollen-tubes to the enclosed ovules. 



Class I. MONOCOTYLEDONES. 



Seeds with a monocotyledonous embryo. Flowers usually 3-merous. 

 Stem endogenous. Leaves mostly with parallel venation. 



Including families 5-21 ; also the palms and several other families 

 which are not found in Patagonia. 



Family 5. TYPHACE^E. Cat-tail Family. 



Marsh or aquatic plants with creeping rootstocks and glabrous erect 

 terete stems. Leaves long-ensiform. Flowers monoecious, in dense ter- 

 minal spikes. Male flowers above ; each with 2-7 stamens. Ovary 1-2- 

 locular. Perianth of bristles ; other bristles inwards. Seeds with endo- 

 sperm. 



Typha, the only genus. Species 10, in temperate and tropical regions. 



TYPHA Linn. 



1. T. ANGUSTIFOLIA Linn. 



Stem slender. Leaves 4-12 mm. broad. Spikes light brown, a gap 

 between the staminate and pistillate flowers. Stigmas linear. Pollen- 

 grains simple. 



(Eurasia and E. United States.) Argentina and North Patagonia; in 

 swamps near Carren-leofu. 



"Cosmopolitan; probably disseminated by water-birds." (J. Ball.) 



2. T. DOMINGENSIS Pers. 



Robust, 2-4 meters high. Leaves 5-10, plane, the lower 20 mm. broad. 

 Spikes mostly remote. Hairs of male spikes rusty-brown, mostly dilated at 

 apex, with curved branches. Female spike brown ; flowers bracteolate, 

 pedicels i mm. long. Hairs apically brown, shorter than the stigmas. 



Texas and southwards to Argentina and North Patagonia and West 

 Indies. 



