FLORA ILUSTRADA BRITTON DEL NORTE DE U.S.A.-CANADA: POACEAE AVENAE

I- CALMOVILFA TALL GRASSES WITH HORIZONTAL ROOTSTOCKS,SPIKE UNIFLOWER WITH 3 SCALES,THE THIR HAIRY AT BASE SIMILAR TO CALAMAGROSTIS BUT WITHOUT PROLONGED RACHILIA

CALAMOVILFA LONGIFOLIA SCALES GLABROUS

CALAMOVILFA BREVIPILIS SCALES PUBESCENT SPIKELET ADPRESSED

CALAMOVILFA GIGANTEA THIRD SCALE DENSELY HAIRY AT BASE RACEMES SPREADING

II-APERA SPICA-VENTI ANNUAL, SPIKELET UNIFLOWER 3 SCALES THE THIRD SMALL WITH AWN FROM EMARGINATE APEX

APERA SPICA-VENTI

III-HOLCUS LANATUS ANNUAL PANICLE,SPIKELET 2 FLOWER,LOWER PERFECT UPPER STAMINATE

HOLCUS LANATUS

IV=AIRA ANNUAL PANICLE,SPIKELET 2 FLOWER THE INER SCALES MUCRONATE WITH A DORSAL AWN

1- AIRA CARYOPHYLLEA

AIRA CARYOPHYLLEA

AIRA PRAECOX

V-DESCHAMPSIA-AVENELLA-VAHLODEA PERRENNIAL, OPEN PANICLE SPIKELET 2 FLOWER BOTH PERFECT, RACHILLI EXTENDET,SOMETIMES TERMINATE IN STAMINATE FLOWER

1- DESCHAMPSIA CAESPITOSA

DESCHAMPSIA CAESPITOSA

2-DESCHAMPSIA FLEXUOSA= AVENELLA FLEXUOSA

AVENELLA FLEXUOSA

3- DALECHAMPSIA PENNSYLVANICUM= VAHLODEA ATROPURPUREA

VAHLODEA ATROPURPUREA

VI-TRISETUM PERENNIAL SPIKELET 2 TO 4 FLOWER ALL PERFECT OR THE UPPERMOST STAMINATE RACHILLIA EXTENDED BEYOND FLOWER,FLOWER COULD HAVE AWN

1-TRISETUM SPICATUM

TRISETUM SPICATUM

2-TRISETUM FLAVESCENS

TRISETUM FLAVESCENT

3 TRISETUMPENNSYLVANICUM = SPHENOPHOLIS PENNSYLVANICA

SPHENOPHOLIS PENNSYLVANICA

VII-AVENA ANNUAL OR PERENNIAL SPIKELET 2 TO MANY FLOWERED LOWER PERFECT UPPER STAMINATE SCALES 4 T0 MANY,AWNEDOR APEX 2 TOOOTHED OTHER SIMILAR TO AVENA ARE MELICA,SCIZACHNE AND AVENULA

1-AVENA FATUA