Sect. II. St. pinnately branched; l. falcato-secund, nerve single, areolæ linear.
a. Dioicous.
[dagger] Stems and branches strongly hooked at apex.
498. H. aduncum. Dill. L.[1] (H. exannulatum, Gümb.) St. 2-4in. erect, sub-pinnate; br. short, simple, few; l. crowded, narrow, falcato-secund, lanceolate-acuminate, striate, faintly sub-serrulate near the base; nerved nearly to apex; basal cells larger and inflated, gradually passing into the long narrower ones above; capsule sub-cylindrical, curved, cernuous, on a seta 1in. long or more.
Marshes and marshy heaths. IV. V.
499. H. Kneiffii. B. & S. (H. aduncum, Hedw. Stirpes, IV., t. 24, and Schp.) St. 2-6in. long, erect, sub-*pinnate; l. falcato-secund, somewhat distant, lanceolate-acuminate, occasionally faintly sub-serrulate near the base, thinly nerved two-thirds the length, not striate, basal angles decurrent excavate, of lax sub-quadrate cells, those above elongate rectangular; caps. cylindrical oblong arcuate, broadly annulate.
Swamps and marshes. VI.
- ↑ This name has been wrongly given to some half-dozen different species; but I am informed by Dr. Braithwaite (in lit. 29, Mch. 1872), that he has recently consulted the original specimen of Dillenius on which Linnæus founded the species, and from his examination the synonymy of this group must be altered as above. The diagnoses of this and the next four species are from his pen; the name aduncum should be retained as being older than exannulatum.
