Based on a molecular DNA phylogeny of three plastid (rpl32-trnK, rps16 intron, and rps16-trnK) and nuclear ITS regions investigating 32 species of Agrostidinae, we describe two new genera, Agrostulagen. nov. with a single species and Alpagrostisgen. nov. with four species; provide support for five species in a monophyletic Podagrostis; and include a small sample of 12 species of a monophyletic Agrostis s.s. (including the type and most species of Neoschischkinia), that separates into two clades corresponding to A. subg. Agrostis and A. subg. Vilfa. Agrostula differs from Agrostis in having leaf blades with pillars of sclerenchyma which are continuous between the adaxial and abaxial surface of the blades, dorsally rounded glumes with blunt to truncate and erose to denticulate apices, florets ½ the length of the glumes, lemmas equally wide as long, widest at (or near) apex, apices broadly truncate, irregularly 5 to 7 denticulate to erose, awnless, anthers longer than the lemmas, and rugose-papillose caryopses. Alpagrostis differs from Agrostis in having geniculate basally inserted awns and truncate lemma apices with lateral veins prolonged from the apex in (2)4 setae. The following eight new combinations are made: Agrostula truncatula, Agrostula truncatula subsp. durieui, Alpagrostis alpina, Alpagrostis alpina var. flavescens, Alpagrostis barceloi, Alpagrostis setacea, Alpagrostis setacea var. flava, and Alpagrostis schleicheri. In addition, we provide a key separating Agrostula and Alpagrostis from Agrostis s.s. and other genera previously considered as synonyms of Agrostis; lectotypify Agrostis alpina Scop., A. schleicheri Jord. & Verl., A. truncatula Parl., and A. truncatula var. durieui Henriq.; and neotypify A. setacea Curtis.

中文翻译：

---

Agrostis 附近物种的系统发育支持识别来自欧洲的两个新属，Agrostula 和 Alpagrostis（禾本科、Pooideae、Agrostidinae）

基于三个质体（rpl32-trnK、rps16 内含子和 rps16-trnK）的分子 DNA 系统发育和调查 32 种 Agrostidinae 的核 ITS 区域，我们描述了两个新属，Agrostulagen。十一月 与单一物种和 Alpagrostisgen。十一月 有四种；为单系 Podagrostis 中的五个物种提供支持；并包括 12 种单系 Agrostis ss 的小样本（包括 Neoschischkinia 的类型和大多数物种），其分为对应于 A. subg 的两个进化枝。Agrostis 和 A. subg。维尔法。Agrostula 与 Agrostis 的不同之处在于，叶片具有在叶片的正面和背面之间连续的厚壁柱，背面圆形的颖片具有钝到截断和糜烂到具小齿的顶端，小花是颖片长度的 1/2，外稃等宽长，在（或接近）先端最宽，先端宽截形，不规则的5到7具小齿到糜烂，无芒，花药长于外稃，和具皱纹的乳头状果核。Alpagrostis 与 Agrostis 的不同之处在于具有膝状基部插入芒和截断外稃顶点，侧脉从 (2)4 刚毛的顶点延长。制作了以下八种新组合：Agrostula truncatula、Agrostula truncatula subsp。durieui, Alpagrostis alpina, Alpagrostis alpina var. 苦参, Alpagrostis barceloi, Alpagrostis setacea, Alpagrostis setacea var. flava 和 Alpagrostis schleicheri。此外，我们提供了一个关键，将 Agrostula 和 Alpagrostis 与 Agrostis ss 和以前被认为是 Agrostis 同义词的其他属分开；lectotypify Agrostis alpina Scop., A. schleicheri Jord。& Verl.、A. truncatula Parl. 和 A. truncatula var. durieui Henriq.; 和新典型化 A. setacea Curtis。