Links: Stipeae home; Intermountain Herbarium
These notes prepared by M. Barkworth
Anatherstipa was the name given by Peñailillo to a group of grasses identified by Parodi (1950) as the Obtusae group. Dr. M.A. Torres proposed the name Anatherostipa for the same group in May, 1997, and her article was received by many major herbaria at the endo of that month.. Peñailillo's article, which came out in Gayana, did not reach other herbaria until August, but priority dates from when two copies are made available to appropriate institutions The editor of Gayan stated that two copies of the issue of Gayana had been made available by the publication date on the issue's cover, December, 1996, so Anatherostipa has priority over Anatherostipa.
The information on this page comes from Torres because Peñailillo merely made the necessary new combinations. Because my Spanish and Latin are limited, those more than slightly interested in the genus should be very sure to consult Torres' article.
The type of Anatherostipa is A. saltensis (Kuntze) Peñailillo. The species of the genus grow at 3,200-5,000 m in arid desert regions of the mountains in southern Bolivia and Peru, northwestern Argentina, and northern Chile. Parodi (1950) mentioned that two of the species, A. bomanii and A. saltensis [both cited as species of Stipa] were known for their toxicity. The following is a translation of Dr. Torres' key distinguishing Anatherostipa from other Stipoid genera that occur in northeastern Argentina. The generic description follows the key.
Anatherostipa (Hack. ex Kuntze) Peñailillo
Plants perennial, caespitose, 10-50 cm tall, golden, ? or stramineous to ochroleucous (often conspicuously so at maturity); innovations intravaginal, prophyllum 2-awned, 2-5 cm long. Culms erect. Leaf sheaths glabrous; internodes shorter than the sheaths; auricles absent. Ligules membranous, 3-10 mm (or shorter). Leaf blades setaceous-filiform, convolute, erect or curved, 3-17 cm long, 0.3-0.5 mm in diameter, glabrous. Inflorescence very narrow, with few spikelets, exserted, 3-15 cm long; branches appressed to the rachis. Glumes 2, papery, obtuse of somewhat acute, equal or subequal, (1)-3-veined, the veins evident. Lemma fusiform, the apex only slightly attenuate, 2.5-4 mm long, the lemma body glabrous or pubescent, scabrous, shiny or slightly shiny, the lemma margins open (back of the palea visible, not completely concealed). Crown absent. Awn central, capillary, straight, arcuate, or flexuous, or reduced to a diminutive mucro, glabrous, deciduous or persistent. Callous obtuse, about 0.5 mm long, pilose with short hairs from near the base. Palea papery, flat or keeled, glabrous or pilose, as long as the body of the lemma, 2-veined, the veins extending to, or almost to, the tip. Lodicules 2-3, hyaline. Androecium of 3 stamens, the anther sacs glabrous, rarely subglabrous. Caryopsis ellipsoid, the hilum linear, straight, ventral.
Lemma epidermis composed of long fundamental cells with markedly sinuous walls. Hooks, sometimes associated with unicellular hairs often present, both of these kinds of cella having swollen bases. Silica cells, cells having a siliceous body in their interior, are sometimes present.