333 XXXIX. COMPOSITAE. {Tanacetum. 



mouth with -i narrow spreading lobes ; achene linear-clavate, with 4 prominent 



ribs : male with larger corolla. — Buch. in Trans. N.Z.I, xiv. (1881) 354, 



t. 34, f. i. 



SOUTH Island : Otago : Mount Alta and Black Peak, Hector and Bucha^mn ! Common on 

 all high mountains, 4,000ft. to 6,000£t., Petrie ! Dec, Jan. 



When dry the leaves appear to be partially flattened, with a strong marginal nerve, which is 

 scarcely observable in fresh specimens. Closely related to A. pusilla, of which it may be a variety. 



6. A. pusilla, Hook./., Handbk. 139. Stems slender, prostrate, emitting 

 wiry roots. Leaves Jin.— Jin. long, narrow-linear, acute, flat above, with a 

 prominent midrib below. Head solitary, shortly pedunculate, sunk amongst 

 the upper leaves; involucral bracts linear, obtuse, ribbed. Achenes linear- 

 clavate, 4-angled. 



NORTH Island : snowy places amongst the Ruahine Mountains, Colenso ! 



I have copied the description from Hooker, as the species has not been found since its 

 discovery nearly fifty years ago. My thanks are due to the Director of the Kevsr Herbarium for a 

 precious fragment of Colenso's specimen. 



7. A. muscosa, T. Kirk in Trans. N.Z.I, xxiv. (1891) 422, t. 36. 

 Minute. Stems ^in.— Jin. high, or forming depressed patches Jin.-lin. in 

 greatest diameter. Leaves densely imbricating, Jin.— ^in. long, erect, linear, 

 concave above, excessively coriaceous, truncate or retuse, with a strong marginal 

 nerve, rarely rounded at the tip. Heads solitary, sunk amongst the apical 

 leaves, very shortly pedunculate ; involucral bracts 5, oblong, acuminate, obtuse 

 or acute, nerves indistinct. Florets 4 or 5. Female corolla narrow, tubular, 

 indistinctly 4-toothed, with a bristle springing from each angle of the ovary ; 

 achene truncate above, tetragonous, setose, with an erect bristle at each corner 

 as long as the achene itself. Male achenes smaller, abortive. 



STEWAKT Island : summit of Eakiahua, 2,300ft., T. K. Jan. 



A singular little plant, closely resembling a sterile Tortula or Bryum. It closely approaches 

 the original A. emarginata, Cass., from the Falkland Islands, and, with the exception of Lemna, is 

 the smallest flowering-plant in the colony. It is the only species with setose achenes. 



* TANACETUM, Tourn. 



Head discoid or nearly so; involucral bracts imbricating in several series. 

 Eeceptaole convex, naked. Florets all tubular, fertile ; female marginal, 1-seriate, 

 3-4-toothed. Disk-florets 4-5-toothed ; anthers obtuse at the base. Achenes angled 

 or ribbed, with an epigynous disk, crowned with a membranous border. Strong- 

 scented herbs, with erect stems, sometimes suffruticose. Leaves alternate. Heads 

 solitary or corymbose. 



*T. vulgare, L., Sp. PI. 844. Stems erect, 2ft.-3ft. high, grooved, glabrous. 

 Leaves 2in.-4in. long, oblong, the lower petioled, the upper half-amplexicaul, pinnate ; 

 leaflets linear, pinnatifid or 2-pinnatifid or inciso-serrate, glandular-dotted. Heads 

 numerous, corymbose ; involucral bracts coriaceous, the outer acute, the inner longer, 

 obtuse. Female florets terete, obliquely truncate, 3-toothed, rarely 0. Achene 

 obovoid, 5-ribbed. Disk membranous, 6-lobed. 



NOBTH and SOUTH Islands : established in several localities from Auckland to Otago but 

 nowhere abundant. Tansy. March. Europe. ' 



