38 Charles E. Besscy 



(rarely 2- to 3-seeded). Phoenix, Chamaerops, Calamus, Oreo- 

 doxa, Cocos. (Pf. II, 3, i.) 



Order Graminales. Compound pistil reduced to 2 or 3 car- 

 pels ; ovule solitary ; perianth reduced to small scales or entirely 

 wanting. 



Family 27. Restionaceae. Rush-like herbs or undershrubs, 

 with spiked, racemed, or panicled flowers ; perianth segments 6 or 

 less, chaffy; pistil i- to 3-celled ; ovules orthotropous, pendulous. 

 Restio. (Pf. II, 4, 3.) 



Family 28. Centrolepidiaceae. Small rush-like herbs with 

 flowers in spikes or heads; perianth none; pistil i- to 3-celled; 

 ovules orthotropous, pendulous. Ccntrolepis. (Pf. II, 4, 11.) 



Family 29. Flagellariaceae. Erect or climbing herbs with long 

 narrow leaves; pistil 3-celled; ovules solitary; fruit a i- to 2- 

 seeded berry. Flagellaria. (Pf. II, 4, i.) 



Family 30. Cyperaceae. Sedges. Grass-like herbs with 3- 

 ranked leaves; perianth segments bristly or none; pistil i-celled; 

 ovules anatropous, erect. Cyperus, Scirpns, Fimbristylis, Rhyn- 

 chospora, Carex. (Sp. 1959.) (Pf. II, 2. 98.) 



Family 31. Poaceae. Grasses. Mostly erect herbs with hol- 

 low, jointed stems, and 2-ranked leaves ; perianth segments of 

 2 to 6 scales or vestiges; pistil i-celled; ovules anatropous, 

 ascending. Bambiisa, Bromus, Triticum, Bouteloua, Avena, 

 Agrostis, Phalaris, Or\za, Panicnm, Andropogon, Zea. (Sp. 

 3545-) (Pf. n, 2, I.) " 



Sub-Class AIONOCOTYLEDONEAE-EPIGYNAE. Peri- 

 anth and stamens arising above the carpels; (carpels inferior). 

 Flowers from actinomorphic to zygomorphic. 



Order Hydrales. Compound tricarpellary pistil, inferior to 

 all other parts of the flower; flower-leaves in each whorl alike in 

 shape (flower regular) ; seeds without endosperm. 



Family 32. Vallisneriaceae. Tape-Grasses. Small aquatic 

 herbs mostly inhabiting the fresh waters of temperate climates. 

 J'allis)ieria, Hydroeharis, PhUotria. (Pf. II, i, 238.) 



74 



