Herbs perennial, erect. Basal leaves largest, margin coarsely serrate to incised-pinnatipartite. Verticillasters many flowered , widely spaced or in long robust spikes, densely lanate-villous or glabrous. Flowers sessile. Calyx tubular-campanulate to broadly funnelform, 5-toothed, sometimes limb dilated, 5-apiculate; teeth short, broadly truncate, rounded, ovate or triangular, apex spiny; sinuses between teeth with ovate-triangular appendages. Corolla 2-lipped; tube mostly included, narrow; upper lip narrow, galeate or falcate, concave, narrowed at base, bearded or villous inside and on margin; lower lip spreading, 3-lobed, middle lobe largest. Stamens 4, anterior 2 longer; some filaments with comblike-fimbriate appendages at base; anther cells 2, divaricate. Style unequally 2-cleft, anterior lobe larger. Nutlets obovoid, triquetrous, subtruncate, densely bearded at apex.
About 60 species (or only five in the strict sense) : Kazakhstan, Kyrgyzstan, Mongolia, Russia, Tajikistan, Turkmenistan; SW Asia; five species in China.
Several botanists have recently rearranged the generic placings of Eremostachys and Phlomis (cf. Adylov, Kamelin, & Makhmedov, Novosti Sist. Vyssh. Rast. 23: 110-114, 1986; Vvedensky, Conspect. Fl. As. Med. 9: 74-113, 1987). By adopting their concepts species 1 and 2 would be placed in Phlomoides along with all but one species of Phlomis recorded from China, species 3 and 4 in Paraeremostachys and only E. moluccelloides would remain in Eremostachys.
The Genus Eremostachys is further organized into finer groupings including:
- Species: ZipcodeZoo has pages for 37 species, subspecies, varieties, forms, and cultivars in the Genus Eremostachys: E. acanthocalyx · E. acaulis · E. adenantha · E. adpressa · E. alberti · E. azerbaijanica · E. badakshanica · E. cephalariifolia · E. desertorum · E. edelbergii · E. eriocalyx · E. fulgens · E. glabra · E. gymnoclada · E. iberica · E. labiosa · E. labiosiformis · E. laciniata · E. laevigata · E. loasifolia · E. macrophylla · E. mogianica · E. moluccelloides · E. molucelloides · E. nuda · E. pauciflora · E. phlomoides · E. pulvinaris · E. regelania · E. regeliana · E. sanglechensis · E. sogdiana · E. speciosa · E. superba · E. tuberosa · E. vicaryi · E. vulnerans
- "Eremostachys". in Flora of China Vol. 17 Page 140. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
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