B. Papp szerk.: Studia Botanica Hungarica 32. 2001 (Budapest, 2001)

Langangen, A.; Leghari, S. M.: Some charophytes (Charales) from Pakistan

breja spring, 15.4.1999; 7. Prov. Sindh: Dadu, Thano Bola Khan, Bareja spring, 5.9.1999, (form); 8. Prov. Sindh: Hyderabad, Hyd River, pond near airport, 21.4.1996; 9. Prov. Sindh: Nain Baran super highway bridge, 17.1.1997; 10. Prov. Sindh: Sanghar, Tando Mitha Khan, 5.2.1998; 11. Prov. Sindh: Sanghar, Jati pond (seepage water of Nara canal), 29.1.1997; 12. Prov. Sindh: Sanghar, Khinmbhro at edge of Thar desert, 29.1.1998; 13. Prov. Sindh: Sanghar, Khori pond, 15.5.1998; 14. Prov. Sindh: Sanghar, Peronmal, 24.3.1999; 15. Prov. Sindh: Sanghar, pond near Bakar lake, 5.2.1998; 16. Prov. Sindh: Sanghar, pond village Abdullah Leghari and Khori pond, 2.2.1998; 17. Prov. Sindh: Sanghar, Tado, Adam road, 8.2.1999; 18. Prov. Sindh: Sanghar, Tando Mitha Khan, Khori pond, 24.3.1999; 19. Prov. Sindh: Sanghar, Tando Mitha Khan, pond full with single species near the bridge of Nara canal, 5.2.1998; 20. Prov. Sindh: Sanghar, Tando Mitha Khan, Serin Wari, 24.3.1999; 21. Prov. Sindh: Shikarpur, Shikarpur in the ponds outside rice fields, 3.3.1998; 22. Prov. Sindh: Thatta, Kinjhar lake, 21.12.1996, 24.2.1998; 23. Prov. Sindh: Thatta, Sonda pond, 24.2.1998. References to Pakistan: FARIDI (1955), PAL et al. (1962). General: Chara contraria has much in common with Chara vulgaris, but has tylacanthous cortex. Normally both species are strongly encrusted. Monoecious. Comments on studied plants: 7-25 cm in height. Stem diameter to 0.65 mm and internodes up to 4 cm long. Strongly encrusted with lime. Cortex diplostichous, from slightly to strongly tylacanthous, and spine-cells very short to papillous and solitary. Stipulodes papillous and in two series. Whorls consist of 7-10 branchlets, each up to 20 mm long, 1/6-1 times the length of internodes. Branchlets of 2-5 segments, the end-segments with 3—4 ecorticated cells. End-cell short, from 0.25-1.0 mm. Anterior bract-cells and bracteoles normally well developed, as long as the oogonium and up to 2 mm. Posterior bract-cells always papillous. Richly fertile, but ripe oospores were not common. Oogonia 0.6-1.0 mm long, 0.4-0.55 mm wide. Coronula 0.15 mm long, 0.25 mm wide. Oospore 0.6 mm long, 0.4 mm wide, and black, with 11 ridges. Antheridia 0.35 mm in diameter. The specimens found in Peronmal (loc. 14) were especially full of ripe, black oospores. Specimens collected in Bareja spring, Dadu, have branchlets which are gymnophyllous or partly so. Such specimens can be named Chara grovesii Pal, which has gymnophyllous branchlets and has been found in Burma, or C. contraria var. nitelloides A. Braun which have one or two abbreviated, corticated branchlet segments, and which is known from Bolivia. There are reasons to believe that such taxa are within the range of variation of C. contraria. Ecology: Specimens found in Kotri pond (loc. 1) belong to f. capillacea Migula. They are found together with Enteromorpha sp. and Monotroma sp. This indicates saline or brackish water. The species is normally found in freshwater.