全 文 ：Arenaria dawuensis , a new species of the
　 Caryophyllaceae from Sichuan , China 　
LI An_Jen　BAN Qin
(Institute of Botany , the Chinese Academy of Sciences , Beijing 100093 , China)
Abstract　Arenaria dawuensis A.J.Li &Q.Ban , a new species of the Caryophyllaceae from
Dawu County , Sichuan , China , is described and illustrated.It is related to A.fimbriata (E.
Pritz.)Mattf.in having fusiform roots , cymose inflorescence , two linear styles , but differs by hav-
ing spatulate leaves , sepals sparsely and long ciliate along margins , and petals shorter than sepals
and finely fimbriate at apex.
Key words　Arenaria , A.dawuensis A.J.Li &Q.Ban , Caryophyllaceae , Sichuan , China.
In the course of checking specimens of the Caryophyllaceae in the Herbarium of the Institute of
Botany , the Chinese Academy of Sciences (PE), the following new species of the genus Arenaria
L.was discovered.
Arenaria dawuensisA.J.Li &Q.Ban , sp.nov.　Fig.1
道孚无心菜
Species nova affinis A.fimbriatae (E.Pritz.)Mattf., sed foliis spathulatis , sepalis margine
sparse longeque ciliatis , petalis sepalis brevioribus apice tenuiter fimbriatis , capsulis 1-2(-3)_
seminalibus differt.
Herba perennis.Radix fusiformis , brunnea.Caulis pumilus , erectus , 2-3 cm altus , ex basi it-
eratim dichotome ramosissimus , purpureus , dense hirsutus.Folia sessilia , spathulata , 7-8mm lon-
ga , 2-2.5 mm lata , crassiuscula , utrinque hirsuta , basi amplexicaulia , margine longe ciliata , apice
obtusa vel acuta , costis paullo prominulis.Inflorescentia cymosa , pauciflora;bracteae foliis persimi-
les , sed minores , utrinque hirsutae;pedicelli 2.5-4 mm longi , paullo crassi , dense hirsuti;calyx
basi rotundatus;sepala late lanceolata , 2-2.5 mm longa , viridia , sparse hirsuta , dorso purpureo_
uninervia , basi connata , margine membranacea , sparse longeque ciliata , apice acuta;petala lanceo-
lata , alba , circ.1.5 mm longa , sepalis breviora , basi angusta , apice tenuiter fimbriata;stamina 10 ,
petalis breviora;filamenta filiformia , inferne dilatata , quarum 5 longiora sepalis opposita , basi glan-
dulosa , 5 breviora petalis opposita , basi eglandulosa;antherae ellipticae , flavae;ovarium longe
ovoideum;styli 2 , lineares.Capsula ellipsoidea , sepalis paullo brevior vel eis aequilonga , 4_valvata;
semina 1-2(-3), elliptica , circ.1 mm longa , dense graciliterque rugosa.
Herb perennial.Root fusiform , brown.Stem dwarf , 2-3 cm tall , erect , with numerous
branches from base , purple , densely hirsute.Leaves sessile , spatulate , 7-8 mm long , 2-2.5
　Received:30 July 2002　Accepted:15 Apri l 2003
Supported by a special grant from the Chinese Academy of Sciences for the routine running of herbaria.
植 物 分 类 学 报　41(4):390-392(2003)
Acta Phytotaxonomica Sinica
Fig.1.　Arenaria dawuensis A.J.Li &Q.Ban.　A , habit;B, leaves;C , calyx;D , petal;E , stamen and sepal;F , stamen
and petal;G , pisti l;H , dehiscent capsule;I , seed.Drawn by Y.B.Sun from the type gathering , H.Smith 11932.
mm broad , thickish , long hirsute on both sides , base amplexicaul , margin long ciliate , apex obtuse
or acute;costa slightly raising.Inflorescence cymose , few_flowered.Bracts very similar to leaves
but smaller , long hirsute on both sides.Pedicels 2.5-4 mm long , thickish , densely long hirsute.
Calyx rounded at base;sepals broadly lanceolate , 2-2.5 mm long , green , sparsely long hirsute ,
1_purple_nerved abaxially , base connate , margin membranaceous , sparsely long ciliate , apex acute.
Petals lanceolate , white , about 1.5mm long , shorter than sepals , base narrow , apex finely fimbri-
ate.Stamens 10 , shorter than petals;filaments filiform , broadened in the lower part , 5 longer ones
opposite to sepals , base glandular , 5 shorter ones opposite to petals , base not glandular;anthers el-
liptic , yellow_brown.Ovary long ovoid;styles 2 , linear.Capsule ellipsoid , slightly shorter than or
equal to sepals , 4_valved dehiscent.Seeds 1-2 , rarely 3 , elliptic , about 1 mm long , densely and
No.4 LI An_Jen et al.:Arenaria dawuensis , a new species of the Caryophyllaceae from Sichuan , China 391　
finely rugose.
China.Sichuan (四川):Dawu (道孚), alt.4600 m , on slope of schistaceous rocks ,
1934_07_09 , H.Smith 11932(holotype , here designated , PE).
Arenaria dawuensis is only known from its type locality.According to the collector s note , it
grows on slope of schistaceous rocks.This species is related to A.fimbriata (E.Pritz.)Mattf.in
having fusiform roots , cymose inflorescence , two linear styles , but differs by having spatulate
leaves , sepals sparsely and long ciliate along margins , and petals shorter than sepals and finely fim-
briate at apex.
四川无心菜属(石竹科)一新种
李 安仁 　班 　勤
(中国科学院植物研究所　北京 100093)
摘要　描述了四川无心菜属(石竹科)一新种———道孚无心菜 Arenaria dawuensis A.J.Li&Q.Ban。该种
具纺锤形根 ,聚伞花序 , 花柱 2 , 线形而与纟遂瓣无心菜 A.fimbriata (E.Pritz.)Mattf.相近 ,但叶匙形 , 萼片
边缘具长缘毛 ,花瓣短于萼片 , 顶端细流苏状而不同。
关键词　无心菜属;道孚无心菜;石竹科;四川;中国
392　 Acta Phytotaxonomica Sinica Vol.41