— 50.i — 



Yal\ a externa 2-5-denlata, dcntibus incgularitcr aiistatis vel muticis, intenui 

 i-fiuca aut lacero-dontata : caryojisis libera, valva corollina interna, cincta. 



69. ECHINARIA Desf. Florcs polygamo-nionoici in capitulum ecliinatuni, 

 s])ioulis sul)-2-floris, floro alloro lierniaiilirodilo allcro masculo aut sterili: pcri- 

 gonii glunia calycina nioiul)raiiacca 2-valvis brcvis, valvis apicc 2-lobis uni- 

 rostratis , extcrioribus quandoquc 2-roslratis , valva externa in spiculis su- 

 pcrioribus 2-6-rostrata, interna 3-rostrata ; glunia corollina cartilaginea 2- 

 valvis , valva externa niajore apicc truncata , rostris 5-7 digitalo-rostratis , 

 circa internani 2-rosti'atani, convolutis: s(|uaniae neclaritcrac duo truncatac : 

 caryopsis libera, stylis persistcntibus coronata. 



TO. TRIODI.V Bi-ovni Florcs spiculac oblongae cartaceae in panicula stri- 

 cta: porigonii gluma calycina 2-valvis, spiculis, subacijualis, valvis acuminatis; 

 gluma corollina 2-valvis, valva externa majorc ovata, basi utrinque fosciculo 

 piloruin barbata, apice 3-denticulata : scjuaniae nectarifcrac duo disticae: ca- 

 ryopsis libera, valvis corollinis persistcntibus, occultata. 



71. AVEN.V L. Florcs in panicula racemo vcl spica, spiculis nitidis nia- 

 gnitudinc variis : perigonii gluma calycina communis 2-valvis niulica , valvis 

 niargine et apice menibranaceis; gluma corollina 2-valvis alterna dislica nuda 

 vel axe et interne barbata , valva externa major apice 2-fida vel 2-denlata 

 saepe 2-seta, dorso aristata, arista geniculata infra geniculuni contorta, valva 

 interna niutica 2-fida vcl 2-dentata: squamae duo nectariferae: caryopsis ob- 

 longa libera aut, valvis corollinis, inclusa. 



72. PO.V L. Florcs spicali mutici in panicula vcl racemo, rachide fle- 

 xuosa : perigonii gluma calycina communis bivalvis, spiculis subaequalis; co- 

 rollina alterna distica libera aut villo connexa , suprema interdum abortiva 

 bivalvis, valvis inao(jualibus margine menibranaceis, externa carinala, internani 

 linearem plicatam, includens: s({uamula nectarifcra bifida vcl duo approxima- 

 tae : caryopsis libera, valvis corollinis, inclusa. 



73. BRIXA L. Florcs mutici in panicula laxa, spiculis nitidis cordato- 

 ovatis turgidiusculis : perigonii glunia calycina spiculis niulto brcvior, valvis 

 concavis in antliesi palentibus; glunia corollina bivalvis, valvis admoduni inac- 

 qualibus muticis, externa major navicularis cartilaginea , margine pellucido, 

 interna minima ovata, margine inflexo, basi ovarii adbaerente : squamae ne- 

 ctariferae duo : caryopsis 2-rostris, valvis corollinis, cincta. 



74. CYNOSUllUS L. Florcs in racemo composito secundo, raccmulis sub- 

 dicotomis: spiculac pauciflorae secundae, valvis solitariis (potius bracteis) al- 

 ternis disticis muticis aristatisque, tcclae : florum fertilium perigonii gluma 



