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广西苏铁一新种(英文)



全 文 :   第 38 卷 第 3 期
1999 年 5月
中山大学学报 (自然科学版)
ACTA SCIENTIARUM NATURALIUM
UNIVERSITATIS SUNYATSENI
 
Vol.38 No.3
May 1999
 
文章编号:0529-6579 (1999)02-0121-02
A New Species of Cycas from Guangxi

ZHANG Hong-da (CHANG Hungta)1 , ZHONG Ye-cong2 , LU Zhao-fu3
(1.School of Life Sciences , Zhongshan University , Guangzhou 510275 , China;
2.Guangxi Acadamy of Forest Exploration , Nanning 530011;
3.Baise Forestry Bureau Guangxi , Guangxi 533000)
Abstract:Cycas crassipes Chang , Zhong et Lu collected from Longling County Guangxi , characterized by
the numberous pinnae , hiant carpophy lls and robuste pedicels.
Keywords:Cycas;C.crasspes;robust pedicels;numerous pinnae
CLC number:Q 949.4.62  Document code:A
Specios carpophyllis majoribus 22 cm longis , 11 cm latis , pedicelis reobustis 10 cm longis , 1 ~
1.2 cm in diam , pinnis numerosis 140 ~ 150 jugis distincta;a Cycas fairylakea et.C.segmentifida
pinnis pluribus , petiolis breviobus , carpophyllis majoribus robustioribus differt.
  Truncus circ.2 cm altus.Folia
simplicipinnat , petiollis 75 cm longis ro-
bustis 2.5 ~ 3 cm in diam., spinis 33-
jugis , 1 ~ 2 mm longis , inter se 1 ~ 1.5
cm remotis , frontibus 155 ~ 175 cm
longis , 40 ~ 45 cm latis , pinnis 140 ~
150 jugis , 25 ~ 32 cm longis , 1 cm
latis , tenuiter coriaceis , interse 8 ~ 10
mm distantibus , apice acuminatis.Car-
pophylla 19 ~ 22 cm longa , 10 ~ 12 cm
lata , parte inferiore pedicello 10 ~ 11 cm
longo , 10 ~ 12 mm in diam , robusto lu-
teo-tomentoso , utringue ovulo 2 ~ 3 in-
structa;parte superiore lamina lato-ova-
ta , pectinatim pinnatifida , 11 ~ 13 cm
longa , 10 ~ 12 cm lata , segmentis 15 ~
22 jugis , 3 ~ 5 cm longis , 2 ~ 3 mm
latis , segmento terminali.4 ~ 4.5 cm
longo , 8 ~ 10 mm lato.Semina lutea
Fig.1 Cycas crassipes Chang et al.
1 leave;2 carpophyll
基金项目:广东省自然科学基金 (970187)资助项目
收稿日期:1999-03-18  作者简介:张宏达 , 男 , 1914 年生 , 教授.
glabra immatura.
Guangxi:longling , alt.690 m in arenoso saxum , 29 Mejus , 1998 , Zhong Y.C.8778 ♀ ty-
pus , SYS.
Trunk 2 m tall.Leaves simplicipinnate , fronds 155 ~ 175 cm long , 40 ~ 45 cm wide with 140
~ 150 pair pinnae , pitioles circ.70 cm long , robust , spines 33 pairs , pinnae 25 ~ 32 cm long ,
circ.1 cm wide , thinly coriaceous , midrid elevated on both sides , marghin slightly revolute.Car-
pophylls 19 ~ 22 cm long , 10 ~ 12 cm wide , lower part pedicellate , pedicels 10 ~ 11 cm long , 1 ~
1.2 cm in diam , robust , yellowish tomentose , ovules 2 ~ 3 each side , upper part broad ovate 11 ~
13 cm long , 10 ~ 12 cm wide , pectinate with 15 ~ 22 segments in each side , terminal segment 4 ~
4.5 cm long , 8 ~ 10 mm wide , Seeds yellowish , glabrous , immature.
广西苏铁一新种
张宏达 , 钟业聪 , 陆照甫
摘 要:厚柄苏铁 , 新种.
Cycas crassipes Chang , Zhong et Lu 叶长 230 ~ 250 cm , 有羽息片 140 ~ 150对.大孢子叶
粗大 , 长 19 ~ 22 cm , 上部篦状齿裂 , 有裂片 15 ~ 22对 , 顶片宽8 ~ 10 mm , 长4 ~ 4.5 cm ,
下半部果柄长 10 ~ 11 cm , 宽 1 ~ 1.2 cm , 极粗壮 , 胚珠每侧 2 ~ 3个.新种采自广西隆林 ,
钟业聪8778 , 模式存于中山大学植物标本室.
关键词:苏铁属;厚柄苏铁;果柄粗大;羽片多数
中图分类号:Q 949.4.62
122 中山大学学报 (自然科学版)             第 38 卷
中山大学生命科学学院 , 广东 广州 510275