四川狼尾草Pennisetum sichuanense S. L. Chen et Y. X. Jin
四川狼尾草Pennisetum sichuanense S. L. Chen et Y. X. Jin
8．四川狼尾草（南京中山植物园研究论文集）图版112
Pennisetum sichuanense S. L. Chen et Y. X. Jin in Bull. Nanj. Bot. Gard. Mem. Sun Yat Sen 1988-1989: 5. 1988-1989.
多年生。根茎短，秆直立，单生或丛生，高40-60厘米。叶鞘疏松包茎，短于节间，具纵棱，凹处常被短细硬毛，鞘口被毛；叶舌膜质，长约1.5-2毫米，先端呈纤毛；叶片细线形，长3-12厘米，宽2-5毫米，两面常被脱落的疣基短小刺毛。圆锥花序紧密，直立或弯曲，长5-12厘米，宽0.6-0.9厘米；主轴具纵棱，疏被短毛；残留在主轴上的总梗极短，顶端呈一束刺毛；刚毛稀少，微粗糙，长3-5毫米，大都短于小穗，其中仅个别与小穗等长或稍长于小穗，灰绿色，小穗单生，卵状披针形，长4-6毫米；第一颖卵形，近膜质，先端锐尖或尖，具细毛，无脉或不明显3脉，长为小穗1/3-1/2；第二颖厚膜质，稍短于小穗，先端芒尖，具3-5脉；第一小花通常雄性，第一外稃与小穗等长，厚膜质；雄蕊3枚；第二小花两性，第二外稃长稍短于小穗，纸质，先端具芒尖，具5脉（脉基部不明显），第二内稃膜质；鳞被2，楔形，折叠，雄蕊3，花药顶端无毫毛；花柱基部联合。叶表皮细胞结构上下近相似；均为有波纹，壁较厚的长细胞，偶有短细胞，密生小刺毛。花果期8-11月。
特产四川；多生于海拔2 000-3 000公尺的河岸及山坡上。模式标本采自四川得荣。
本种花序细弱，花序轴近无毛等性状近似白草 P. centrasiaticum Tzvel.，而残留穗轴上为总梗极短并呈一束刺毛近似长序狼尾草P. longissimum S. L. Chen et Y. X. Jin但刚毛大都短于小穗，第二颖长稍短于小穗，及叶片表皮细胞结构为上下表皮均为有波纹，壁较厚的长细胞，偶见短细胞并密被小刺毛等性状均与两种明显有别。
《Flora of China》 Vol. 22 (2006)
Pennisetum sichuanense S. L. Chen & Y. X. Jin
四川狼尾草 si chuan lang wei cao
Perennial, rhizomatous. Culms tufted, erect, 40–60 cm tall. Leaf sheaths loose, usually shorter than internodes, hispidulous throughout, pilose at mouth; leaf blades linear, 3–12 × 0.2–0.5 cm, both surfaces papillose-pilose when young; ligule 1.5–2 mm. Inflorescence narrowly linear, dense, erect or slightly curved, 5–12 × 0.6–1 cm; axis pubescent; involucre enclosing one spikelet; bristles glaucous, sparse, 0.3–0.5 cm, usually shorter than spikelet. Spikelet ovate-lanceolate, 4–6 mm; lower glume ovate, membranous, 1/3–1/2 as long as spikelet, 0–3-veined, acute; upper glume thickly membranous, slightly shorter than spikelet, 3–5-veined, acute or acuminate; lower floret usually staminate, lemma as long as spikelet, thickly membranous; upper lemma slightly shorter than spikelet, papery, acute; anthers without hairs at tip. Fl. and fr. Aug–Nov.
* Mountainsides, stream banks; 2000–3000 m. Sichuan, Yunnan.
This species is close to Pennisetum flaccidum.
别名：四川狼尾花草;
科名：禾本科 Gramineae
属名：狼尾草属 Pennisetum
8．四川狼尾草（南京中山植物园研究论文集）图版112
Pennisetum sichuanense S. L. Chen et Y. X. Jin in Bull. Nanj. Bot. Gard. Mem. Sun Yat Sen 1988-1989: 5. 1988-1989.
多年生。根茎短，秆直立，单生或丛生，高40-60厘米。叶鞘疏松包茎，短于节间，具纵棱，凹处常被短细硬毛，鞘口被毛；叶舌膜质，长约1.5-2毫米，先端呈纤毛；叶片细线形，长3-12厘米，宽2-5毫米，两面常被脱落的疣基短小刺毛。圆锥花序紧密，直立或弯曲，长5-12厘米，宽0.6-0.9厘米；主轴具纵棱，疏被短毛；残留在主轴上的总梗极短，顶端呈一束刺毛；刚毛稀少，微粗糙，长3-5毫米，大都短于小穗，其中仅个别与小穗等长或稍长于小穗，灰绿色，小穗单生，卵状披针形，长4-6毫米；第一颖卵形，近膜质，先端锐尖或尖，具细毛，无脉或不明显3脉，长为小穗1/3-1/2；第二颖厚膜质，稍短于小穗，先端芒尖，具3-5脉；第一小花通常雄性，第一外稃与小穗等长，厚膜质；雄蕊3枚；第二小花两性，第二外稃长稍短于小穗，纸质，先端具芒尖，具5脉（脉基部不明显），第二内稃膜质；鳞被2，楔形，折叠，雄蕊3，花药顶端无毫毛；花柱基部联合。叶表皮细胞结构上下近相似；均为有波纹，壁较厚的长细胞，偶有短细胞，密生小刺毛。花果期8-11月。
特产四川；多生于海拔2 000-3 000公尺的河岸及山坡上。模式标本采自四川得荣。
本种花序细弱，花序轴近无毛等性状近似白草 P. centrasiaticum Tzvel.，而残留穗轴上为总梗极短并呈一束刺毛近似长序狼尾草P. longissimum S. L. Chen et Y. X. Jin但刚毛大都短于小穗，第二颖长稍短于小穗，及叶片表皮细胞结构为上下表皮均为有波纹，壁较厚的长细胞，偶见短细胞并密被小刺毛等性状均与两种明显有别。
《Flora of China》 Vol. 22 (2006)
Pennisetum sichuanense S. L. Chen & Y. X. Jin
四川狼尾草 si chuan lang wei cao
Perennial, rhizomatous. Culms tufted, erect, 40–60 cm tall. Leaf sheaths loose, usually shorter than internodes, hispidulous throughout, pilose at mouth; leaf blades linear, 3–12 × 0.2–0.5 cm, both surfaces papillose-pilose when young; ligule 1.5–2 mm. Inflorescence narrowly linear, dense, erect or slightly curved, 5–12 × 0.6–1 cm; axis pubescent; involucre enclosing one spikelet; bristles glaucous, sparse, 0.3–0.5 cm, usually shorter than spikelet. Spikelet ovate-lanceolate, 4–6 mm; lower glume ovate, membranous, 1/3–1/2 as long as spikelet, 0–3-veined, acute; upper glume thickly membranous, slightly shorter than spikelet, 3–5-veined, acute or acuminate; lower floret usually staminate, lemma as long as spikelet, thickly membranous; upper lemma slightly shorter than spikelet, papery, acute; anthers without hairs at tip. Fl. and fr. Aug–Nov.
* Mountainsides, stream banks; 2000–3000 m. Sichuan, Yunnan.
This species is close to Pennisetum flaccidum.