Dendrobium gregulus Seidenf. 1985 SECTION Stachyobium Photo by © Pieter C. Brouwer and his Nature Photo Website

Another Angle

Flower Closeup Photo courtesy of Botanická zahrada a arboretum Mendelova zemedelská a lesnická univerzita v Brne, Brno, Czech

Plant and Flowers Photo by Linda & Mikael Karlbom,

Common Name The Crowded Dendrobium [refers to the closely spaced pseudobulbs]

Flower Size .6" [1.5 cm]

Found only in northwestern Thailand in open deciduous montane forests on tree branches at elevations of 1100 to 1250 meters as a miniature sized, cool growing epiphyte with densly clustered, tiny, round pseudobulbs enveloped by onion-like sheaths and carrying several deciduous at flowering leaves that blooms in the winter on a 1.2 to 2.4" [3 to 6 cm] long, 4 to 6 flowered inflorescence arising from the apex of leafless stems.

D elliotianum, D gregulus, D garretii and D microbulbon are often mixed up. They can be easily separated by D elliotianum having a solid purple lip with a white flower, D gregulus has a light sulphur yellow flower with red purple veined sidelobes and D garretii has off white flowers with violet veins and a white or green lip with a central yellow patch and purple veined sidelobes. D microbulbon has a mostly white flower with just a few rose markings on the sidelobes and a white lip.

Synonyms Aporum heterocaulon (Guillaumin) Rauschert 1983; Dendrobium heterocaulon Guillaumin 1965

References W3 Tropicos, Kew Monocot list , IPNI ; *Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 drawing fide; The Orchids of Thailand 1960 pg 235 fig 177 as D alpestre drawing fide; Orchid Species Culture; Dendrobium Bakers 1996; Dendrobium and its Relatives Lavarack, Harris and Stocker 2000 photo good; A Field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo good; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo good; The Dendrobiums H. P. Wood 2006; A Compendioum of Minaiture Orchid Species Vol 1 Parsons and Gerritsen 2013 photo fide; Orchid Digest Vol 82 #3 2018 photo fide;