《中国植物志》|| 杉科 TAXODIACEAE Warming ||杉科 TAXODIACEAE Warming ||水松属 Glyptostrobus Endl.

5.水松属——Glyptostrobus Endl.
Endl. Syn. Conif. 69. 1847.
半常绿性乔木；冬芽形小。叶螺旋状着生，基部下延，有三种类型：鳞形叶较厚，在多年生或当年生主枝上辐射伸展，宿存2-3年；条形叶扁平，薄，着生于幼树的一年生小枝或大树的萌生枝上，往往列成二列状；条状钻形叶辐射伸展列成三列状，生于大树的一年生短枝上；鳞形叶宿存，条形或条状钻形叶均于秋后连同侧生短枝一同脱落。雌雄同株，球花单生于有鳞形叶的小枝枝顶，直立或微向下弯；雄球花椭圆形，雄蕊15-20枚，螺旋状着生，有2-9 (多为5-7)花药，花丝短，药室纵裂，药隔椭圆形；雌球花近球形或卵状椭圆形，由20-22枚螺旋状着生的珠鳞组成，珠鳞很小，背 (下)面生有较珠鳞为大的卵形苞鳞，腹（上）面基部生有2枚胚珠（上下两端的珠鳞无胚珠），受精后珠鳞迅速增大成肥厚的种鳞。球果直立，苞鳞与种鳞几全部合生，仅苞鳞的先端与种鳞分离，三角状，向后反曲，位于种鳞背面的中部或中上部；中部种鳞的上部边缘有6-10个三角状尖齿，顶部的种鳞多棱、长条形，能育种鳞有2粒种子；种子椭圆形，微扁，具向下生长的长翅；子叶4-5枚，发芽时出土。
本属模式种：水松Glyptostrobus pensilis (Staunt.) Koch [Thuja pensilis Staunt., Taxodium japonicum var. heterophyllum Brongn., G. heterophyllum (Brongn. ) Endl. ]
本属仅有水松1种，为我国特产，分布于广东、广西、福建、江西、四川、云南等省区。

《云南植物志》|| 杉科 Taxodiaceae nom. conserv. ||杉科 Taxodiaceae nom. conserv. ||水松属 Glyptostrobus Endl.

4．水松属 Glyptostrobus Endl.
落叶或半常绿乔木；树皮纵裂成不规则长条片，树干基部通常膨大，有曲膝状呼吸根；冬芽小。枝叶稀疏，叶三型：条状钻形叶及条形叶大，柔软，冬季与无芽的小枝一同脱落，条形叶常排成羽状二列，条状钻形叶排成三列；鳞形叶小，贴近小枝，排列紧密，冬季宿存。球花单生枝顶；雄球花椭圆形，雄蕊多数，各具2—9(多为5—7)个花药；雌球花卵状椭圆形，苞鳞多数，珠鳞小而薄，中部珠鳞具2胚珠，受精后珠鳞增厚，苞鳞与珠鳞结合而生。球果倒卵圆形，直立，种鳞多数，木质，扁平肥厚，背部上缘具6—10微向外反卷的三角状裂齿，近中部有一反卷的尖头，发育的种鳞具2粒种子，成熟后脱落；种子椭圆形或倒卵形，微扁，基部有向下的长翅；子叶4—5枚，发芽时出土。
仅1种，为我国特有树种，分布于南部及东南部各省区。

《Flora of China》|| Taxodiaceae || ||水松属 Glyptostrobus

4. Glyptostrobus Endlicher, Syn. Conif. 69. 1847.

水松属 shui song shu

Trees semievergreen, monoecious; winter buds small; branchlets dimorphic: perennial and annual; perennial branchlets remaining green for several years, with white lines of stomatal dots, becoming ridged and grooved with decurrent leaf bases; annual branchlets deciduous, short, never developing scars or buds. Leaves spirally arranged, sessile, trimorphic: leaves on main branches, perennial branchlets (after 1st year), and fertile branchlets radially spreading, scalelike, relatively thick (resembling leaves of Cupressus but spirally arranged), persistent for 2 or 3 years; leaves on annual branchlets of mature trees in 3 rows, radially spreading, subulate, quadrangular in cross section (resembling leaves of Cryptomeria), deciduous with branchlet as a unit; leaves of annual branchlets of young trees and seedlings often 2-ranked, sessile, linear, flat, thin, deciduous (resembling leaves of Taxodium). Pollen cones terminal on short, erect branchlets bearing scalelike leaves, solitary, ellipsoid; microsporophylls 15-20, spirally arranged, sessile; pollen sacs (2-)5-7(-9). Seed cones terminal, shortly pedunculate, erect when mature, ± pyriform; bracts of mature cones ± completely connate with cone scales (free only at apex), triangular, recurved, borne on central or middle distal part of abaxial side of cone scales; ovules 2 per bract axil; cone scales 20-22, spirally arranged, sessile, woody, basal scales sterile, median scales 2-seeded, with 6-10 triangular, acute teeth at distal margin, distal scales ligulate, multiangular, sterile. Seeds ellipsoid, slightly flattened, small, with a single, terminal, recurved wing. Cotyledons 4 or 5. Germination epigeal. 2n = 22*.

One species: China, extinct in the wild in N Vietnam.

A Tertiary relict species, the only surviving member of a genus formerly widespread prior to the Quaternary glaciations. Resembling the American genus Taxodium (which is introduced in China) in its vegetative characters, and occurring in similar habitats.