On cephalozia (a genus of hepaticae) : its subgenera and some allied genera / by Richard Spruce.
- Richard Spruce
- Date:
- 1882
Licence: Public Domain Mark
Credit: On cephalozia (a genus of hepaticae) : its subgenera and some allied genera / by Richard Spruce. Source: Wellcome Collection.
20/116 (page 6)
![1. ProthaUium slender, linear or almost filiform, consisting of only a single (more rarely in part of a double) series of cells ; either simple or siibramose ; often passing at the apex insensibly into the stem, and per- sisting a long time. 2. Plants usually small and tender, in only a few species rather robust; of almost all shades of green and brown, or whitish and pellucid, sometimes tinged with rose; growing in depressed matted tufts, or flakes, or creeping over Sphagna and other mosses. 3. Stems usually x^rostrate or procumbent, leafy throughout, or rhi- zomatous and leafless at the base—very rarely with the leaves reduced to mere scales—still more rarely frondose ; branches all iwstical, sx)ringing from the underside of the stem, and axillary to the underleaves where any exist; radicles usually cox^ious, x>^le and slender. 4. Leaves mostly succubous, in a few species transverse, in a very few subincubous; horizontal or assurgent, never defiexed, roundish, or subquadrate, or cuneate, rarely lanceolate, very seldom x^lane, usually concave, and in most sx3ecies somewhat comx^licate and bilobed (but never divided to the very base, nor with cax)illary lobes), in a very few sx>ecies undivided or variable at the ax>ex; margins uniformly j^lane or subincurved—never convex or recurved—very mostly quite entne, but in a few sx)ecies toothed. Reticulation in the typical species lax and x^ellucid, in a few sx^ecies denser and subox^aque; cells often subquadrate, in the subgenus Alohiella, large and oblong or rectangular; cell-walls mostly thin, rarely conspicuously thickened at the angles; cuticle smooth or scaberulous. 5. Underleaves much smaller than the side leaves, and oftener un- divided at the ax^ex, but in some sx^ecies subdentate at the margin ; en- tirely absent from many sx^ecies [excexfl in the involucre, where they exist in every Ce2)halozia.] G. Injlorescence dioicous or autoicous—very rarely x^‘'ii'C)icous. An- dnccia aineiitiforu, occux^ying the whole, or only a part, of a branch, rarely terminal on the stem. Bracts in many pairs, leafy (even where there are no stem-leaves) bilid, uniformly mona)idrous. 7. Gynweia capitate, usually seated on an abbreviated branch [i.e. cladocarpous), but sometimes terminal on longer branches or on the main](https://iiif.wellcomecollection.org/image/b28081547_0020.jp2/full/800%2C/0/default.jpg)
