Part 6. JUNCACEAE 1: Rostkovia to Luzula - Species Plantarum ...

JUNCACEAE (Luzula)
patent, 1.5–2.5 (–4.0) cm long, equalling or overtopping their partial inflorescence, with
lower bracts herbaceous and upper ones scarious. Inflorescence erect, rarely slightly
nodding, interrupted, 2.5–6 cm long, of 3–6 (–10) clusters, with lower clusters pedunculate
and upper ones subsessile; all clusters elongated, narrow (c. 4 mm in diam.), cylindrical
composed of subclusters, many-flowered. Bracteoles c. 1 mm long, ovate, sparsely ciliate,
scarious. Tepals ±lanceolate, subequal, glabrous; outer tepals acuminate, subaristate; inner
tepals ±mucronate, 1.7–2.0 (–2.3) mm long; base castaneous; margin paler or membranous.
Stamens 3 or 4–6; anthers 0.5–0.8 mm long; filaments 0.3–0.4 mm long; style 0.1–0.2 mm
long; stigmas c. 1 mm long. Capsule ±ovoid, ±acute, deep brown; capsule segments 1.6–1.8 ×
1.0–1.1 mm long. Seeds dark, ellipsoidal, 0.9–1.0 (–1.1) mm long, 0.6–0.7 mm wide; seedcoat
not distinct; apex not distinct; appendage c. 0.05 mm long, fibrillate. Fig. 17.
Southern Chile and Southern Argentina. 85: AGS, CLS. In grasslands, usually at lower
altitudes. Map 67.
85. ARGENTINA SOUTH: Tierra del Fuego, Río Azopardo, P.Dusén 584 (UPS); Laguna Patos near Río
Carbon, 4 Jan 1909, C.J.F.Skottsberg 943 (S, UPS); Chubut, Trevelin, T.Meyer 9277 (LIL); Chubut, José de
San Martín, 530 m, 22 Jan 1902, Hözberg (S); Neuquén, Ñorquín, Copahué, 2000 m, C.A.O’Donnell 2097
(LIL); Neuquén, Pino Hachado, A.Burkart 9651 (SI). CHILE SOUTH: Magallanes, Cerro Paine, S.F.Anilot
6094 (SGO); Aysén, Laguna San Rafael, 3–4 m, C.Muñoz 6147 (SGO); Los Lagos, Mechuque, F.W.Pennel
12622 (SGO); Los Lagos, San Rafael, 1921, C.M.Hicken (SI 10974).
Most plants from Chile and from the southern part of the range are triandrous, with
occasional occurrence of flowers with 4–6 stamens. Plants from Santa Cruz, Chubut and
Neuquén, Argentina, are predominantly hexandrous (flowers with 3–5 stamens sometimes
found in the same inflorescence as hexandrous ones). Differences in stamen number is the
only significant variation found within the species (the names L. patagonica and L. correae
refer to the predominantly hexandrous form).
38. Luzula chilensis Nees & Meyen ex Kunth, Enum. Pl. 3: 312 (1841)
Juncoides chilensis (Kunth) Kuntze, Revis. Gen. Pl. 2: 734 (1891). T: Chile, ‘ad Maipú fluv., alt. 10000
ped.’, 1831, Meyen; syn: B, destroyed, see F.G.P.Buchenau, Abh. Naturwiss. Vereine Bremen 6: 418, Plate iv,
fig. 1, a–d (1879) [et Junc. S.-Amer., 1879]; Chile, Bíobío, Antuco, E.F.Poeppig [Coll. Pl. Chil. III] 105; syn:
BM, P, S.
Luzula rigida Phil., Linnaea 33: 267 (1865); Luzula chilensis f. rigida (Phil.) Fuentes, Bol. Mus. Nac. Hist.
Nat. 90: 138 (1917). T: Chile, Colchagua, ‘in montibus subalpinis Talcaregué, Feb 1831, [J.Gay] 284;
holo: SGO.
Luzula chilensis f. longifolia Barros, Darwiniana 10: 322 (1953). T: Argentina, Neuquén, Río Alumine,
Otto Asp. 98; syn: BAF; Chubut, Río Percey, 6 Feb 1945, A.Castellanos; syn: LIL114302.
Perennials, usually 12–25 (–55) cm tall, caepitose, sparsely to ±densely hairy; rhizome short;
stolons absent. Basal leaves (5–) 6–8 (–12) cm long, 2.5–3.5 (–6) mm wide; cauline leaves 2,
usually short, 1.5–3.0 cm long; all leaves acute, with margins distinctly papillose-serrulate.
Lower bract membranous-brownish, rarely herbaceous, usually 1.5–2.0 cm long, ciliate,
±equalling inflorescence. Inflorescence usually congested as a single slightly nodding or
±suberect head c. 2 × 1.5 cm, of 5–6 clusters (usually 3–6-flowered); less often clusters
distinct, ±interrupted, inflorescence about 5 cm long. Bracteoles scarious with straw-brown
base, ovate, acuminate, fimbriate-ciliate, 1.5–2.0 mm long. Tepals ±equal, glabrous,
lanceolate, c. 2.7–3.3 mm long, acuminate-aristate, pale castaneous brown below and on
midrib, otherwise membranous to pale straw-brown. Stamens 6; anthers usually 0.6–0.9 mm
long; filaments 0.4–0.5 mm long; style 0.3–0.4 mm long; stigmas 1.2–1.6 mm long. Capsule
ovoid to subglobular, ±obtuse, castaneous brown, shining, equalling or shorter than perianth;
capsule segments 2.4–3.0 × 1.5–2.1 mm. Seeds paler castaneous brown; seed-coat distinct,
forming a yellowish apex, 1.2–1.5 mm long, (0.9–) 1.0–1.2 mm wide; appendage (0.1–) 0.2 mm
long, fibrillate. Fig. 17.
Most common in S and C Chile and S and W Argentina, reaching Valparaiso (district of
Aconcagua) in C Chile. 85: AGS, AGW, CLC, CLS. Distribution imperfectly known. Wet
mountain slopes and grasslands, usually below 2000 m, rarely above 3000 m. Map 68.
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