1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C. 429 
Holothrix—continued. 
lip erect or spreading, divided at apex into from three 
to many segments, produced at base into a spur; scapes 
slender, usually hairy, and without sheaths. Leaves one 
or two, sessile, ovate or orbicnlar-reniform, radical. Two 
of the species haye been introduced. They thrive in 
a mixture of peat, sphagnum, and charcoal, and require 
the temperature of a warm greenhouse. 
H. Lindleyana (Lindley’s).* (. white, racemose; scape 
slender; lip five-lobed, with an imrolled spur. J. ovate, 
spreading on the ground. South Africa, 1888. A pretty little 
Orchid. (G. C. 1888, iii., p. 364, f. 56.) 
H. orthoceras (straight-spurred). . white, striped with 
urple, numerous; scape purple, erect, 6in. long. J. ovate, 
in. long, green, with grey reticulations. South Africa, 1897. 
(B. M. 7523.) 
HOLY HERB. See Verbena officinalis. 
HOLY THISTLE. See Silybum Marianum. 
HOMALANTHUS. Syys. Duania, Omalanthus. 
Including Dibrachion (of Regel). To the species de- 
scribed on p. 149, Vol. Il., the following should be 
added : 
H. giganteus (gigantic). 
long, nearly thrice exceeding the 
densely pubescent beneath. Otherwise _ resembling 
H. Leschenaultianus. Java, 1866. SyNs. Carumbium gigan- 
teum, Dibrachion peltatum (R. G. 1866, p. 100, t. 504). 
H. Leschenaultianus (Leschenault’s). The correct name of 
A. populifolius. 
HOMALIUM (from homalos, even, consistent; the 
stamens in some of the species are regnlarly divided 
into fascicles). Including Astranthus. Orb. Samydacez. 
A genus embracing abont thirty species of stove trees or 
shrubs, natives of Asia, Africa, and North Australia. 
One or two of them have been introduced, but they are 
probably not now seen outside botanical collections. 
HOMALOMENA. Syn. Zantedeschia (of Sprengel), 
in part. Chamecladon (which see) is included in this 
genus by Sir J. D. Hooker, in the “Flora of British 
India.” Flowers borne on an inappendiculate spadix, 
which is included in the spathe and often shortly 
stipitate, the male inflorescence cylindrical or fusiform, 
the female shorter and narrower; spathe straight, 
cylindrical or conyolute below, the lamina conyolute or 
gaping, acuminate. Leaves ovate- or triangular-cordate 
or lanceolate ; petioles often elongated and long-sheathing. 
To the species described on p. 149, Vol. II., the 
following should be added: 
insignis (remarkable).* j., spathe green, 34in. to 4in. long, 
obtusely keeled at back, the apex compressed-rostrate ; spadix 
white, Sin. long. J. lft. long, 6in. broad, elliptic-oblong, obtuse 
and shortly mucronate, rounded at base, green above, suffused 
purple beneath; petioles fuscous-purple, channelled, 3in. to 
Far hae sheathed to the middle. Borneo, 1885. (L H. 1885, 
t. : 
H. rubescens is the correct name of H. rubra. 
H. Siesmeyeriana (Siesmeyer’s). _., spathe purplish-red 
outside, white within, the tube and limb indistinguishable; 
peduncle purplish-red. 7. slightly sagittate, the veins, midrib, 
and margin beneath tinted red; petioles purplish-red, long, 
glabrous. Malaya, 1885. 
HOMALOPETALUM (from homalos, flat, and 
petalon, a petal ; the middle petal [lip] is like the lateral 
ones). ORD. Orchideer. A monotypic genus. The species 
is a tiny, stove Orchid, allied to Tetramicra (which see 
for culture). 
H. jamaicense (Jamaica). #. solitary on peduncles lin. long; 
segments 4in. long, linear. J. ovate, in. long. Pseudo-bulbs 
4in. long. Rhizomes creeping. Jamaica, 1896. 
HOMERIA. Six species are included in this genns. 
Perianth segments free to the base, conniyent in a cup, 
then spreading; filaments united in a cylindrical tube; 
spathes cylindrical, few-flowered. Leaf (usually) solitary, 
overtopping the flowers. To the species described on 
p. 149, Vol. II., the following should be added: 
H. aurantiaca is a variety of H. collina. 
H. collina miniata (scarlet). 7. of a tawny red with a yellow 
centre; scape 12in. to 20in. high, bearing several fascicles of 
flowers. 7. one or two, rigid, linear, without any central band. 
(S. B. F. G. 152.) Syn. Morea miniata (A. B. R. 404). 
H. c. ochroleuca (yellowish-white). jj. of a pale yellow. 
(B. M. 1103, under name of H. ochroleuca.) 
H. flexuosa (bending). A synonym of Heraglottis longifolia. 
f., female pedicels becoming very 
rigid bracteate males. 
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Petasites alpina ‘ts 
HOMOGYNE ALPINA. 
synonymous with this species. 
HOMOPTERA. See Insects. 
HOMOS. In Greek componnd words this term means 
similar ; e.g., Homocarpons,, having fruits all of one kind. 
HONCKENYA PEPLOIDES. A 
Arenaria peploides (which see). 
iy ory a rammatea A synonym of Pederia (which 
see). 
HONEY AGARIC. This very conspicuous fungus, 
known scientifically as Agaricus melleus and Armillaria 
mellea, may be found upon many orchard trees as 
well as upon Conifers in large numbers in August and 
later, and is responsible for the disease known as Tree- 
Root Rot. It grows alike as a saprophyte and as a 
parasite, and the clusters of pale yellow sporophores, 
or mushrooms, are very familiar. It is a most destructive 
fungus to trees on which it finds lodgment. Indeed, the 
only compensating influence that the fruit-grower has 
in connection with the pest, is that the mushrooms 
are edible, if of somewhat peculiar flavour. Care 
shonld be taken that trees do not receive exterral 
injury, as when this is the case the spores which are 
distributed when ripe find a congenial resting-place and 
start the trouble in what was previously a non-infected 
area; or, again, the fungus may gain access by means of 
black, stringlike mycelium spreading from the roots and 
eventually working between the bark and the wood. If 
the bark be damaged the wood should be coated with tar 
at once. 
It is practically useless adopting remedial measures when 
once a tree is attacked, and the endeavour must rather be 
synonym of 
-to prevent, as far as possible, the spread of the trouble. 
Hartig, in his ‘‘ Diseases of Trees,’’ recomntends digging 
narrow trenches some distance from the trunk, and thus 
preventing the extension by means of the mycelium 
already referred to. Where old tree-stumps have been 
allowed to remain, and the sporophores are growing 
thereon, they should be collected before the spores can 
be distributed, and either eaten or burnt. Further, the 
stumps should be removed.. On no account should the 
**toadstools,” as they are frequently termed, be kicked 
off the trees, as is frequently done. See also Pinus— 
Fungi, where the pest is illustrated. 
Pte FLOWER, CAPE. See Protea melli- 
era. 
HONEY GARLIC. See Nectaroscordum. 
HONEYSUCELE, BUSH. See Diervilla. 
HONEYSUCEKLE, JAMAICA. See Passiflora 
laurifolia. 
HOOP ASH. See Celtis crassifolia. 
HOOP WITHY. See Rivina. 
HOP AND PLUM APHIS (Phorodon humuli). See 
Aphides and Phorodon. 
HOP-DOG. See Tussock Moths. 
HOPEA. Included under Symplocos (which see). 
HOPEIREIA (of Sprengel). A synonym of Salmea 
(which see). 
HOPLOCAMPA TESTUDINEA. ‘See Apple 
Sawfly. 
HOPLOPHYTUM. Included under Aichmea 
(which see). 
HOP-TREE. See Ptelea trifoliata. 
HORMIDIUM (from hormos, a necklace ; in allusion 
to the small psendo-bulbs clustered at the sides of the 
rhizome). Orv. Orchidez. A genus embracing about seven 
species of dwarf, stove, tropical American, epiphytal 
Orchids, formerly included under Epidendrum (which see 
for culture). Flowers variously disposed; lateral sepals 
broader ; petals like the dorsal sepal or very narrow; lip 
broadly connate with the base of the short column. 
Leaves small, coriaceous or slightly fleshy. H. uniflorwm 
(Syn. H. pygmzum) and H. Sophronitis have been intro- 
duced, but it is doubtful if they are still in cultivation. 
H. bicornutum (two-horned). A synonym of Diacrium 
bicornutum. 
HORNED RAMPION. See Phyteuma. 
