作 者 ：Di Wei-zhong, Ren Yi, Wang Guo-rui
期 刊 ：植物分类学报 1993年 2期
Keywords:Viburnum Linn.,
Abstract:
The present study on pollen grains of the genus Viburnum Linn. Shows that:
1. The pollen characteristics are of no significance in division of sections, but each species has
its own pollen characteristics. 2. The exine can be divided into three types: I. Exine
semitectate, reticulate, muri psilate; II. Exine semitectate, reticulate, muri verrucate; III. Exine
intectate, retipilate or pilate, the heads of pila verrucate. The evolutionary trend of the
exine is III→II→I. 3. Four types of colpus margin are recognized: I. intectate; II. The
colpus margin semitectate, reticulate; III. The colpus margin tectate; IV. Syncolpate at one
pole, the margin tectate (only in V. farreri). 4. The ora can be divided into five types ac-
cording to its membrane shape under SEM: I. The membrane of ora indistinct; II. The
membrane of ora semispherical, discontinuous with colpus margin; III. The membrane of
ora semispherical, continuous with colpus margin; IV. The membrane of ora se-
mi-ellipsoidat, lolongate; V. The membrane of ora semi-ellipsoidal, lalongate, across the
colpus like a bridge. 5. According to both pollen characters and inflorescence, the authors
suggest that Sect. Pseudotinus be divided into two subsections, one including V. sympodiale,
V. furcatum and V. latanoides, which have large sterile marginal flowers with the exine be-
longing to the Type I, and the other including only V. nervosum, which has no large sterr-
ile marginal flowers with the exine belonging to the Type III.