In H. villosa the bracts are strongly ribbed longitudinally over their 

 whole surface and (at least near the margins) rather regularly transversely 

 ribbed, forming square meshes. The transverse septs however are not 

 complete, leaving open communication between the meshes and moreover 

 they are mostly curved in different directions to the damage of the regu- 

 larity of the trellis. In the young bracts the interstices are covered with 

 rather long villous hairs and very rough. The edges are long ciliated. 

 There is often a vague resemblance to the just described variety of 

 H. Pininga, but the higher bracts are most characteristic by their long 

 pungent points. 



The inner flowering bracts embracing each a single bud with its 

 bracteole until the projecting of the limb, are of a softer consistence, 

 hyaline and mucilaginous. The upper parts of the outer ones which are 

 exposed to the air are still coloured and pubescent; the inner ones are 

 almost hyaline and smooth, and getting narrower toward the centre. In 

 H. villosa they are provided with a prickly mucro, like that of the outer bracts 



4. Bracteoles. Bracteoles are wanting in the species with long, pe- 

 duncled inflorescences and in H. villosa, in all other species each flower 

 is accompanied by a lateral open (never tubiform) bracteole. K. SCHUMANN 

 (1904,200) states their absence in H. minor and H.paludosa, but he must 

 have been misled by the study of very bad or wrongly determined speci- 

 mens. In H. minor they are very small, linear, and at the innermost 

 flowers they are sometimes quite obsolete; in H. lycostoma they are also 

 flat and linear and not very conspicuous; in the other species they are 

 about half as long as the coroll tube, in the scyphif era-group the bracteole 

 is as long as the calyx, complicate or cymbiform and appressed to one 

 of the thin edges of the compressed calyx, carinate and provided with a 

 bristle, just like the calyx. 



5. Calyx. The calyx is tubiform dilated above the middle and in the 

 upper part split at the dorsal side so as to become spathaceous. It offers 

 two different types in the species of this genus. In one group, of which 

 H. scyphijera is a representative, it is much shorter than the corolla-tube, 

 compressed, often with a short incision at the backside as well as at the 

 face, and so becoming bilobed near the top and subbidentate, the third 

 tooth being obsolete, the two opposed edges of the compressed tube are 

 carinate thickened and often terminating in a thorny prominance, usually 

 ending in a patent bristle, placed 1 or 2 mm. beneath the top. In the 

 adult buds it does not protrude above the top of the corolla. 



Here belong H. scyphijera, H. Pininga, H. paludosa, H. riticosa, H. 

 villosa, and H. rubra. 



In the other group the calyx is as long as or '/4 shorter than the 

 corolltube, widely spathaceous, much dilated above, but narrowed to the 

 iop. The three segments constitute a wide lanceolate lobe ending in 3 

 very small usually penicillate teeth. In the adult buds it envelopes the 

 coroll and projects above it in a lanceolate point. 



