La familia Amaranthaceae en la flora halófila y gipsófila de México

Abstract

TEN GENERA, 36 SPECIES AND SIX VARIETIES OF THE AMARANTHACEAE FAMILY DISTRIBUTED IN SALINE AND GYPSCOUS SOLIS OF MEXICO ARE DESCRIBED AND KEYED. IN TERMS OF DISTRIBUTION AND AFFINITY TO SALINE OR GYPSEOUS SOLIS, AMARANTHUS GREGGII AND BLUTAPARON VERMICULARE ARE RESTRICTED TO SALINE SOILS; TIDESTROMIA GEMMATA COULD BE CONSIDERED AS INDICATOR OF GYPSEOUS SOILS, T. LANUGINOSA VAR. CARNOSA AND T. RHIZOMATOSA ARE HALOPHYTIC-GYPSOPHILES AND T. TENELLA GROWS BOTH ON GYPSEOUS AND SALINE SOLIS. THESE TAXA ARE ENDEMIC TO MEGAMEXICO 1, WITH THE EXCEPTION OF T. TENELLA AND T. RHIZOMATOSA WITH ARE ENDEMIC TO MEXICO AND B. VERMICULARE, WIDELY DISTRIBUTED. THIRTY-SIX TAXA (31 SPECIES AND FIVE VARIETIES), THAT IS 86%, ARE WEEDS FACULTATIVE ON SALINE OR GYPSEOUS SOILS, NINE ARE ENDEMIC TO MEGAMEXICO 1, FIVE TO MEXICO AND ONE TO MEGAMEXICO 2. TWENTY-ONE TAXA ARE WIDELY DISTRIBUTED: SEVEN IN NORTH AMERICA, 12 IN AMERICA AND TWO ARE COSMOPOLITAN. NEW REPORTS FOR THE MEXICAN FLORA ARE: AMARANTHUS ARENICOLA FOR TAMAULIPAS AND YUCATAN; A SCLEROPOIDES FOR BAJA CALIFORNIA, TAMAULIPAS, VERACRUZ AND TABASCO AND FROELICHIA DRUMMONDII FOR CHIHUAHUA, TAMAULIPAS AND VERACRUZ. THE DISTRIBUTION RANGE IN MEXICO IS EXTENDED FOR ALTERNANTHERA FLAVA TO PUEBLA; AMARANTHUS BERLANDIERI TO COAHUILA, NUEVO LEON AND YUCATÁN; A GREGGII TO QUINTANA ROO; A. PALMERI TO MICHOACÁN, MORELOS AND OAXACA; A. SCARIOSUS TO VERACRUZ; A. VENULOSUS AND A. WATSONII TO SINALOA; CELOSIA PALMERA TO SAN LUIS POTOSÍ AND QUERÉTARO; GOMPHRENA PARVICEPS TO JALISCO, GUANAJUATO AND MICHOACÁN; IRESINE HETEROPHYLLA TO CHIAPAS, CAMPECHE AND YUCATÁN AND I. ROTUNDIFOLOA TO VERACRUZ.