TYPHACEAETRIURIDACEAE iii 



MONOCOTYLEDONEAE 



Typhaceae: rhiz. herbs with linear 2-ranked 1. and cylindrical 

 spikes of naked fls., ? below, 3 above; A 2 5, G i on hairy 

 axis with i pend. ov. ; nutlet, with album, seed. 



Pandanaceae: woody pi., sometimes climbing, with j-ranked 1. 

 and term, or racemed spikes of <? ? fls., i of <x> sta. racemed 

 or umbelled on short or long axis, ? of (oo i) cpls. with sessile 

 stigs. and oo i ov. ; heads of berries or drupes; endosp. oily. 



Sparganiaceae : rhiz. herbs with 2-ranked 1. and fls. in 3 ? heads, 

 ? heads lower. P 3 6, sepaloid, A 3 6, G (i 2), each with 

 i pend. ov. ; fr. drupaceous; endosp. floury. 



Potamogetonaceae : submerged or floating herbs of fresh or salt 

 water, with usu. 2-ranked 1. and sol. or spiked $ or < reg. fls. 

 P usually o, A 4 i, G^ i each with i pend. ov. ; fr. i-seeded. 



Najadaceae: submerged herbs with opp. linear toothed 1. and 

 3 ? fls., 3 P 2, A i term.; ? P i or o, G i, with i basal 

 anatr. ov. 



Aponogetonaceae ; tuber-rhiz. water herbs with submerged or float- 

 ing 1. and spikes (in caducous spathes) of $ reg. fls. P 3 i peta- 

 loid, A 3 + 3 or more, G 3 6 ; fr. leathery, seeds 2 or oo . 



Scheuchzeriaceae : marsh herbs with narrow 1. and racemes or spikes 

 of 5 or rf ? reg. fls.; P usu. 3 + 3, homochlam., bractlike, 

 A 3 + 3, G 3 + 3 sometimes united, outer often absent, i or 2 

 anatr. ov. in each. [Lilaea 5 3 ? , A i, G i.] 



Alismaceae : water or marsh herbs with rad. 1., latex, and much 

 branched infl. of reg. heterochlam. or <T ? fls.; K 3, C 3, 

 A 6 oo or 3, G 6 oo with i oo anatr. ov. and 6 oo styles; 

 no endosp. 



Butomaceae : water and marsh herbs; latex; usu. umbel-like 

 cymose infl. of reg. usu. heterochlam. 5 fls. ; K 3, C 3, A 9 oo . 

 G 6 oo, often united below, with oo ov. on inner surface; 

 follicles. 



Hydrocharitaceae: salt or fresh water pi. with alt. or whorled 1. 

 and sol. or cymose-paniculate fls. enclosed in i or 2 bracts, usu. 

 heterochlam. ,_reg., 3-merous, usu. 3 ? ; A in i 5 whorls, inner 

 often stds., G (2 15), i-loc. with parietal plac. and oo ov. ; 

 fr. irreg. dehisc. with oo seeds. 



i. Triuridaceae. 



46 2 



