Poa sinaica subsp. reuteriana Soreng
Year: 2026
Type: article
Abstract: 11.2Poa sinaica subsp. reuteriana(Boiss. & Buhse) Soreng, stat. et comb. nov. ≡ Poa reuteriana Boiss. & Buhse, Nouveaux Mém. Soc. Imp. Naturalistes Moscou 12: 227. 1860. Type protologue. Persia (Jesd), Jesder Gebirge bei Maswor 4 May 1849. Type specimen. Persia, Jesder Gebirge, bi Maswoo, 4 May 1849, F. Buhse 1404 (lectotype, designated by Tzvelev 1976 451. 1976: LE [LE 00009690, left part); rjs IMG _ 2425. jpg]; isolectotype: G [G 00330291], K [K 000641313, “ In m. pr. Jesd. ”]). Description. Perennials; hermaphroditic; tufted, without rhizomes or stolons, basal tufts 15–20 cm tall, dense, usually forming small mats of bulbs, greyish-green, often violaceous in part; tillers intravaginal, bulbous at the base; bulbs 1–2 cm tall, to 1 cm wide, subglobose to pyriform, outer bulb sheaths papery to subcoriaceous, strongly veined, veins coarse smooth, sheaths persisting as a tunic, inner sheaths mostly 1–2 (– 3) cm long, thickened, indurate at the base for 2–6 (– 10) mm, densely antrorse strigose between the veins; prophylls long, keels loosely antrorsely ciliate-strigose to spinulous, grading distally to scabrous or scaberulous to smooth. Culms 40–55 cm tall, erect or geniculately ascending, terete, terete, antrorsely scabrous to strigose below nodes, internodes antrorsely scabrous or strigose below lower nodes, 1–2 nodes exerted, uppermost node at ca 1 / 3 plant height. Leaves mostly basal; leaf sheaths of culms weakly compressed, strongly imbricated at base, lower culm ones keel and surfaces scabrous to strigose near the collars; basal sheaths forming bulbs; flag-leaf sheaths 9–12 cm long, margins fused 11–17 % their length (15 / 88, 12 / 110 mm), slightly scabrous, collars margins smooth or sparsely scabrous; ligules of upper leaves 4–6 mm long, scarious, slightly white, abaxially slightly scabrous, apices acute to acuminate, entire or shallowly dentate, or lacerate; ligules of sterile shoots 2–4 mm long, narrowly decurrent, apices acute to acuminate, usually deeply dentate to lacerate; blades of culm ca 2–4 cm long, 0.8–1 mm wide, blades gradually reduced upward, thin, flat or folded, withering in age, abaxially proximally the keel smooth or scabrous, abaxial and adaxial surfaces sparsely scabrous, margins moderately scabrous, apices narrowly prow-tipped; flag-leaf blades 2–4 cm long, ca. 1 / 6–1 / 3 the length of its sheath, sterile shoot blades 10–18 cm long, ca 1 mm wide, 5 (– 7) veined, thin with veins fairly pronounced abaxially, abaxially and adaxially sparsely scabrous. Panicles 7–11 cm long, 1–2 cm wide, contracted to loose and lax, moderately crowded with mostly 35–60 spikelets; peduncles well exerted; axis with 2–4 branches at lowest node; primary branches 2.5–3 cm long, with 3–7 spikelets in the distal 1 / 3–1 / 2, steeply ascending, terete to weakly angled, moderately to densely long scabrous; lateral pedicels mostly 2 mm long. Spikelets 8–11 mm long, elliptical to ovate, laterally compressed, greyish-green, not bulbiferous; florets (4 –) 5–7 (– 10); rachilla internodes mostly 0.5 mm long, scabrous-hispid; glumes unequal to subequal, lanceolate, distinctly keeled, keels distally moderately scabrous, edges mostly moderately scaberulous, apices acute; lower glumes 3.2–3.8 mm long, 1 (– 3) - veined, lanceolate; upper glumes 3.5–4 mm long, 3 - veined, lanceolate to narrowly ovate; callus glabrous; lemmas 3.8–4.7 mm long, 3 (– 5) - veined, elliptical-lanceolate, greyish-green, distinctly keeled, subcoriaceous, keel and marginal veins short villous, hairs to 0.5 mm long, blunt tipped to sharply pointed, between veins smooth or distally sparsely scabrous, glabrous, intermediate veins faint or absent, margins inrolled below, distally narrowly scarious / hyaline, edges scaberulous, apices acute, blunt or pointed; palea keels slender long scabrous, between keels smooth, glabrous. Flowers bisexual; lodicules 0.7 mm long, lanceolate, lobed; anthers 1.8 mm long. Caryopsis not seen. 2 n = unknown. Clade code: unknown. Distribution and ecology. Iran. Habitat: Arid mountains, between 1,200 and 2,200 m. Possibly also in Iraq. Conservation status. Endemic to Iran, or possibly also neighboring Iraq, rare, needs further study. Comments. Poa reuteriana was placed in synonymy of P. sinaica (Bor 1970; Tzvelev 1976; and others), followed by Kavousi et al. (2015), who did not examine the type material. The Type material is normal-flowered, has elongated ligules, and has thickened bulb sheaths on elongated bulbs shaped like those of P. sinaica but differs in having bulb sheaths covered with abundant, antrorsely strigose hairs between the broad ribs (vs. glabrous throughout). This trait, although less pronounced, appears in a few other specimens from Iran (listed below). This form is worth tracking until it is better known. There is a syntype: [LE 00009690 (right part, Jesder Gebirge, Apr 1849); rjs IMG _ 2425. jpg]. The specimen at G may have been cultivated from seed by Reuter “ Persia Dr. Buhse 1847 ” {error for 1849} “ 1404 Poa reuteriana Boiss. ” This has antrorsely scabrous prophyll keels, lowest ligules acute 2.5–3 mm long, below culm nodes antrorsely short scabrous to long slender scabrous, lemmas glabrous between the keel and marginal veins, rachilla internodes densely scabrous, palea keels long slender scabrous. Glumes scabrous keel and upper sides. Bor (1968) cited a collection from Iraq as P. reuteriana: “ Lea, Rūz canal ” Iraq {error for Jebel / Jabal Ḩamrīn, Zagros Mts., along the Iraq - Iran boarder}, G. K. Sutherland 380 [BM 015153344, annotated by Bor as P. reuteriana], but noted it might only be a form of P. sinaica. Lea, Rūz canal is the location on Sutherland 381 [BM 015153345, not annotated by Bor, and possibly = P. sinaica]. Representative specimens. Iran. Prov. Kerman et Fars (Inter Saidabad [Sirdjan] et jugum Čah Čoghuk [Čafut], Rechinger 3191 US [pp a. lemmas pubescent on 3 - veins, pp b. lemmas glabrous]); Kurdistan (16 Km N. of Hussainabad between Sanandaj and Saquez, ca. 2160 m, 21 May 1966, Archibald 2108 US); Loristan (Durud, Koelz 15504 US, bulbiferous, 15538 US, bulbiferous, 15676 US, normal and bulbiferous); Prov. Qazvin (33 m. W. Kazwin, in cistus desert, 1,219 m, 4 May 1929, Cowan et Darlington 885 K, US); Prov. Yazd (Types G, K, LE).
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7225821113
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