Aeranthes ramosa, an epiphytic orchid endemic to Madagascar, is known from humid, subhumid forests, and mossy shrubland high-land of E, C, NE, and W of Madagascar, between 530 and 1,500 m in elevation.

The species is known from 55 collections made between 1956 (Rakotovazaha 1150) and 2020 (Ambalabe Spirit Collection 417L847/1). It was not possible to assign coordinates to three collections among the 55 (Bosser 13554, Desroses 1194 and Rakotovazaha 1150). It is also known from 26 observations recorded on iNaturalist, however, no accurate coordinates are available, so these observations were not thus considered in this assessment. The remaining 52 collections with accurate locality data represent 27 occurrences, 12 of which have been recorded within six protected areas. In addition to these legally protected sites, one occurrence has been made in the conservation zone surrounding the footprint of a mining project, which should be subject to protection in the near future. Furthermore, 23 collections representing nine occurrences of this species were made within the footprint of a mining project that has undergone and is undergoing intense human pressure from forest clearing, these occurrences should now be considered as extirpated. Moreother, four collections (Perrier 16872, 18402; Decary 17014; Jean de Dieu 167) representing two occurrences from areas that have largely been cleared for shifting agriculture and where wildfires continue to be frequent, and habitat degradation continues, should be considered as either extirpated, or expected to be extirpated in the near future. The species is also known from six collections (three occurrences) made from Tampoketsa (Ankazobe) and Mandraka, in unprotected forests that are subjected to selective logging, timber harvesting for small-scale subsistence use, and slash-and-burn agricultural practices (tavy).

The species is thus known from 52 collections with accurate locality data representing 11 extirpated and 16 existing occurrences. The extent of occurrence (EOO) of A. ramosa is calculated as 66,338 km² (far exceeding the upper threshold for Vulnerable status under criterion B1) whereas its area of occupancy (AOO) is estimated at 44 km² (which falls within the limits for Endangered status under criterion B2). These 16 existing occurrences represent a total of nine locations (sensu IUCN 2022) with respect to the most serious plausible threat, forest clearing due to mining activities. The loss of the occurrences in the footprint of a mining project and in unprotected forests in Tampoketsa (Ankazobe) and Mandraka that are subjected to selective logging, timber harvesting for small-scale subsistence use, and slash-and-burn agricultural practices (tavy) has induced a continuing decline of its EOO, AOO, quality of the habitat, the number of locations, and mature individuals. We also suspect a population reduction of 33% of the AOO from 72 km² in 2010 to 44 km² in 2040, for this species over 30 years (three generations), where the causes of reduction, forest clearing, and forest degradation, will not cease, and may not be reversible based on a decline in extent of occurrence, area of occupancy, habitat quality, and the number of mature individuals. Aeranthes ramosa is therefore assigned a status of VU A4c; B2ab(i,ii,iii,iv,v).

Aeranthes ramosa, an epiphytic orchid endemic to Madagascar, is known from five Regions: Alaotra-Mangoro (Moramanga, Analamazaotra), Atsinanana (Vohibe-Ambalabe) in the formerly recognized Province of Toamasina, Analamanga (Anjozorobe, Ankazobe, Mandraka) in the formerly recognized Province of Antananarivo, Sava (Loky Manambato) in the formerly recognized Province of Antsiranana, and Sofia (Analamaitso) in the formerly recognized Province of Mahajanga (Madagascar Catalogue 2022).

The population of Aeranthes ramosa is currently thought to be decreasing since the species' habitat is threatened by forest clearing due to mining activities, and forest degradation by selective logging, timber harvesting for small-scale subsistence use, and slash-and-burn agricultural practices (tavy). The number of individuals of A. ramosa is not known and cannot be estimated since the species is an epiphyte on the trunk or branches of trees in humid, and subhumid forests.

Aeranthes ramosa  is an epiphytic herb growing on the trunk and branches of trees on moss-and lichen-covering trees in humid and subhumid forests, and mossy shrubland high-land between 530 and 1,500 m elevation (Madagascar Catalogue 2022).

The species is threatened by intense human pressure such as forests clearing (mining activities), forest degradation (selective logging, small-scale agriculture, timber harvesting for subsistence, and slash-and-burn agriculture practices (tavy). Aeranthes ramosa is also threatened by illegal collection in the field.

The species has an ornamental value and is collected in the field for horticultural purposes and trade. The species is commercialized also at the international level.

Twelve occurrences have been recorded in six protected areas, the Protected Harmonious Landscape of the Anjozorobe-Angavo Complex, the Tampoketsa Analamaitso Special Reserve, the Protected Harmonious Landscape of the Loky-Manambato, the Makira Natural Park, the Analamazaotra National Park, and the Natural Resources Reserve of the Ankeniheny-Zahamena Corridor (CAZ). The species is included in Appendix II of CITES. It has been also brought to cultivation at Ambalabe, Ambatovy and Antananarivo shade houses.