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

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

monoecious, without mucus. Oospore brown, 0.2 mm long, 0.15 mm wide, with 7 ridges, granulated to punctated membrane, with fossae 0.0375 mm broad. Distribution: N. confervacea is found in India (DIXIT 1942, PAL et al. 1962). Distribution in Pakistan is shown in Figure 2. Note: WOOD (1965) is uncertain of the status of this taxon, as depauperate forms of N. tenuissima (Desv.) Kützing can be very similar to N. confervacea. Nitella hyalina (DC.) Agardh Localities (9): 1. Prov. Sindh: Thatta, Kinjhar lake, 21.12.1996, 24.2.1998, 5.8.1998, 13.12.1999; 2. Prov. Sindh: Thatta, Sonda, 24.2.1998; 3. Prov. Sindh: Dadu, Nain Baran super highway, 2.2.1998; 4. Prov. Sindh: Hyderabad, Chalgari pond, River Indus (near Matiari), in flood water from Indus, 10.2.1998; 5. Prov. Sindh: Karachi, Hub dam, 11.3.1998, 29.11.1999; 6. Prov. Sindh: Sanghar, Khori pond, 15.5.1998; 7. Prov. Sindh: Sanghar, Tando Mitha Khan, on the side pond of Nara canal, 24.3.1999; 8. Prov. Sindh: Dadu, Thano Bola Khan, Ali Mohammad breja spring, 15.4.1999; 9. Prov. Sindh: Badin, Karoghangro lake, 30.9.1999. References to Pakistan: ALLEN (1928), FARIDI (1955), PAL et al. (1962). General: Plants 15-30 cm high. Axes up to 0.7 mm in diameter. Easily distinguishable from other species by the accessory branchlets which are shorter than the other branchlets. Monoecious. Comments on studied plants: Typical forms, encrusted with lime, to 18 cm high. Development optimal in February, with richly fertile plants, but with few ripe, brown oospores. The ripening of oospores is infrequent in the studied material. From Kinjhar lake several collections show: - 21.12.1996, richly fertile, no ripe oospores, - 24.2.1998, richly fertile, few brown oospores, 0.35 mm long, 0.3 mm wide. Membrane with 8 ridges, coarse granulate. Fossae 0.038 mm, - 15.8.1998, some brown oospores. Overgrown with filamentous algae (Spirogyra sp.), - 13.4.1999, brown oospores. Specimens from Chalgari pond: up to 18 cm high with axes up to 0.5 mm in diameter and internodes to 4 cm long. Branchlets in two series (heteroclemous), both primary and accessory whorls having fertile branchlets. Eight primary branchlets at a node with many accessory branchlets. Total branchlet length 5.5 mm with primary rays up to 3.5 mm long. Ten secondary rays, 5 tertiary rays and 4 quaternary rays. Dactyls 2-celled, each with a short, conical, acute end-cell.