336 



MANUAL OF POISONOUS PLANTS 



Fig. 136. Arrowhead (Sagittaria Bng,elmanniana). Com- 

 mon in low ground.s. Some species supposed to be poisonous. 

 (After Miss G. E. Johnson, Rep. Mo. Bot. Garden). 



GLUMIFLORAE 



Endogenous plants mostly herbaceous; stems (culms) narrow or without 

 leaves; leaves usually narrow and elongated; entire or serrulate; flowers small, 

 generally perfect, in the axils of dry chaffy scales, called glumes; arranged in 

 spikes or in panicles consisting of spikelets.. 2 families, Gramincae and Cypev 

 aceae. 



Fruit a caryopsis 1 Gramincae 



Fruit an achene 2 Cypcraceae 



I. GRAMiNEAE. Grass Family 

 Fibrous-rooted annuals or perennials, rarely woody, generally with hollow 

 stems; alternate 2-ranked leaves, sheaths split or open on the side opposite the 

 blade; flowers consisting of 2-ranked glumes, forming a 1-many-flowcred 

 spikelet ; flowering glumes enclosing a small bract called the palet ; stamens 

 1-6, usually 3; anthers versatile, 2-ccllcd, stigma hairy. 



