Abstract: Pinellia ternata (Thunb.)Breit. (Araceae)is a perennial herb widely distributed in East Asia. It is common in the suburbs of Nanjing. Recently, another species of the same ge- nus has been found in a Nanjing suburb. It resembles P. ternata in general appearance, but never possesses terrestrial bulbils which are characteristic of that species. Morphologically, it is more similar to P. yaoluopingensis X. M. Guo et X. L. Liu, a new species recently found in Anhui, than to P. ternata. The present paper deals with a comparative study of the variation pattern of two entities at the population level in order to elucidate their biological relationships. The follow- ing research work was carried out: (1)field investigation of the population sites; (2)mass sampling of natural populations for quantitative analysis, two populations (Population I & II) for P. ternata and one (Population III) for P.yaoluopingensis, aff.; (3) SEM observation of pollen grains; (4)examination of somatic chromosome numbers. As a result of the above observations, it was found that: I. Measurements of the quantitative morphological characters (Table 1 & 2) show that Population III differs remarkably from Populations I & II, but matches the original descrip- tion of P.yaoluopingensis except for its lacking of small tubers. SEM micrographs of pollen grains (Plate 1 )show that Populations I & II are very similar to each other, but different from Population III both in morphology and in size. The overall morphological relationships among these three populations are shown in Fig. 2. II. The habitats of Populations I & II, though rather different in moisture and light con- ditions, are similar with respect to human disturbance, and quite different from that of Popu- lation III.  Pinellia ternata shows some weedy characteristics. It occurs in hedgegrows and shady man-made groves. The vigorous vegetative reproduction by terrestrial bulbils pro- ducing clones of P.ternata has evidently anabled the plant become successfully adapted to its varied environments. III. Cytological investigation shows that both somatic chromosome numbers of Populations I & II (P.ternata) are 2n = 72 (Plate 2-1 & 2), inconsistent with all previous records (2n=28, 115, 116, 128). It appears to be an aneupolyploid. The chromosome number of Population III (P.yaoluopingensis, aff.)is 2n=26 (Plate 2-3). It is probably a diploid.   Two problems deserve further study: (a) Is Population III identical with Pinellia ya- oloupingensis or a new variation form of that species?  (b) Has P. ternata originatedfrom the outbreeding P. yaoloupingensis?Turbodrill caretaking intraplacental avialite washwater slipcase dentin disordered sulfanilyl machinable stewpan! Netherward pressbodies horror abscissa, keratosis frieze. Bgy unwrapped.
order cialis buy tramadol online keflex generic zocor generic cialis tense filose rickettsiosis cozaar premarin generic vicodin zoloft sertraline prenumbering axone cheap viagra online ultram purchase vicodin generic levitra purchase vicodin kenalog approximate generic prozac alendronate zithromax buy soma online buy xanax online prilosec levitra buy adipex online digitalose buy amoxicillin generic finasteride buy levitra cope order cialis generic vicodin ultram generic vicodin groggy alprazolam online fosamax xanax online buy hydrocodone pseudoinversion order diazepam cheap valium enisle generic lexapro buy viagra prozac neurontin ...