Cheeseman. — Additions to the Flora of New Zealand. 299 



EXPLANATION OF PLATE XXIIL 



Fig. 1. Chcstophora, showing stipitate fructification ; (a) filament, 

 (b) antheridial filament, (c) zoospore. 



,, 2. CladopJiora (a) ordinary cells. 



(b) sporiferous cells. 



,, 3. ,, (a) portion of filament. 



(b) antheridial filament. 



(c) zoospores. 



4. Spirogyra. 



5. Oscillatoria with sporidial cells. 



6. Micrasterias ampuUacea, var. R, 



7. Cosviarium, sp. ? 



8. Staurastrum, sp. ? 



9. Pediastrum pertusum, 



10. ,, sp,? (a) front. 

 (b) end. 



11. Scenedesmus quadricaiida. 



12. Synedra ulna — to illustrate sporidial multiplication. 



Aet. XLIV. — On some Additions to the Flora of New Zealand. 



By T. F. Cheeseman, F.L.S. 

 [Read before the Auckland Institute, Uth Jidy, 1881.] 

 1. Pozoa reniformis, Hook. f. 

 Although this plant has long been known to occur in the Auckland Islands, 

 where it was originally discovered by the Antarctic Expedition in 1840, 

 there is no recorded instance of its having been collected in New Zealand 

 proper. In January, 1881, I found it growing in some profusion in clefts 

 of rocks on the slopes of Mount Peel, Nelson, at an altitude of about 5,000 

 feet. A good description and excellent plate will be found in the " Flora 

 Antarctica." 



2. Ligusticum deltoideum, n. sp. 

 Small, stout, dark green and shining, very aromatic, 2-6 inches high. 

 Kootstock stout, covered with pale chaffy scales. Leaves numerous, all 

 radical, 2-4 inches long, petiole half the length, broadly deltoid in outline, 

 bipinnate ; segments broadly cuneate, cut down nearly to the base into 3-5 

 sharp flat spreading lobes, i-i inch long, or again pinnate. Peduncles 

 usually shorter than the leaves, naked or with one small leaflet. Umbels 

 small, ^1 inch in diameter. Flowers white or pinkish. Eipe fruit not 

 seen. 



