Flóra: tímarit um íslenzka grasafræði - 01.05.1967, Page 51

Flóra: tímarit um íslenzka grasafræði - 01.05.1967, Page 51
Að lokum bætast við 10 teguudir samkvæmt minni plöntuskrá, en þær eru sem hér segir: l’otentilla egedii Prunella vulgaris Ruppia raaritima Alchemilla vestita Carex pallescens Chrysantheraum leucanthemura Hieracium microdon Matricaria matricarioides Sparganium angustifolium Stellaria humifusa. Heildartala háplöntutegunda, er fundizt hafa í Dalasýslu verður þá 294. Af þeim fjölda hef ég fundið tæplega 78% á mínu rannsóknar- svæði. En við enn nákvæmari leit mætti ætla, að sú tala hækkaði nokk- uð. Vil ég sérstaklega benda á 5 tegundir, er ég tel að eigi eftir að finn- ast á rannsóknarsvæðinu, en þær eru: Erophila verna (L.) F. Chev. Honckenya peploides (L.) Ehrh. Gentiana amarella L. Saxifraga rivularis L. Gentiana aurea L. Nú teljast til háplöntuflóru landsins um 440 tegundir, ef undafífl- arnir eru frádregnir. Sá hluti af þeim fjölda, sem tekið liefur sér ból- festu í Dalasýslu, er þá samkvæmt framanskráðu 63.9%. (Öllum unda- fíflunum sleppt við útreikninginn.) SUMMARY. 1. In the summer 1949 I made a floristic investigation on vascular plants in Dalasýsla in West-Iceland. I selected a well defined area south of the head of Hvammsfjörður. This area embraced the valleys: Hörðudalur, Miðdalir and Hauka- dalur. The object of rny journey was to study the distribution of the species, search for new ones and make a local flora for the selected area. 2. The aforementioned area is situated between Lat. 64° 53' — 65° 05' N. and Long. 21° 14' — 22° W. The mean temperature of the three summer months June, July and August is 9.5° C, but the mean temperature of the year is 2.8° C. The precipiation is great and the soil is covered with snow during the coldest winter months. The valleys which are separated by low mountains (200—600 meters) lie 10—50 meters above sea level. The dominating types of vegetation are as follows: The moor vegetation The fell field vegetation The slope vegetation. 4 TÍMARIT UM ÍSLENZKA GRASAFRÆÐI - FlÓra 49
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Flóra: tímarit um íslenzka grasafræði

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