IRI ISM 
ISN ISO 
tenuifolIS . . . Lgt. blue . 6, H. Bl. P. Dauria . . 1796 
tr:dentat^ 9 . . Blue . . 5, H. Her. P. N. Amer. • 1820 
triflora .... Blue . . 6, H. Her. P. luly . .1821 
tuberOsa . . . Gm. blue . 3, H. Bl. P. Levant . . 1597 
vaxie^ata . . . Striped . 5, H. Her. P. Hungary . 1597 
ventricosa . . . Pa. blue . 6, H. Her. P. Dauria . . 1800 
Verna .... Purple . 4, H. Her. P. Virginia . 1748 
▼ersic6l«r . . . Varieg. . 5, H. Her. P. N. Amer. .1732 
violacea, 10 . . Violet . . 5, H. Her. P. S. Eur. . .1800 
virescens . . . Yellow . 5, H. Her. P. . 1820 
virglnlt-a . . . Blue . . 6, H. Her. P. N. Amer. . 1758 
Xiphium . . . Blu. yeL . 6, H. Bl. P. Spain . .1596 
xiphioldes . . . Blu. yel. . 6, H. BL P. Spain . . 1571 
Irtsf -HEATH, SBC MetiziSsid polipilid. 
Iron-tree, see Siderodendrdn. 
Iron-wood, see Siderdxylon. 
Iron-wood, see Arganld Sideroxplun, 
Ironwort, see Sideritis. 
Isachne, P. Brorvne. From isos, equal, and achnt, a 
glume. Linn. 3, Or. 2, Nat. Or. Graminex. A 
species of grass, of little interest, and common cul- 
tnre — australis. 
IsANTHus, Micheli. From isos, equal, and anthos, a 
flower; in reference to the regularity of the corolla. 
Linn. 14, Or. 1, Nat. Or. Labiatx. A somewhat 
interesting annual, cultivated in sandy peat, and 
propagated from seeds. Synonyms : 1. Tricho- 
sterna brachiatum. 
ccerule&s . . . Blue . . 7, H. A. N. Amer. . 1818 
IsARiA, Persoon. From isos, equal ; on account of 
the regularity of the filaments. Linn. 24, Or. 9, 
Nat. Or. Fungi. A white species, found during 
the spring months on some species of Trichia — 
microscOpicd. 
IsatTs, Caspar Bauhin. From isazo, to make equal ; 
the plant was believed, by its simple application, to 
destroy all roughness of the skin. Linn. 15, Nat. 
Or. Crucifers. The species of this genus have not 
much beauty, and cannot be recommended except 
for general collections. They thrive with ths 
commonest management, and increase from seeds. 
7. a/pina may be increased by dividing the roots. 
Synonymes: \. I. megacar pa. 2. I. dasycarpa. 
alepplc4 . . . Yellow . 6, H. A. Levant . . 1739 
«lpin4 . . . . Yellow . 6, H. Her. P. Italy . . 1800 
armena . . . Yellow . 7, H. A. Levant . .1825 
campeatrls . . Yellow . 5, H. B. Persia . . 1820 
canescena. . . Yellow . 5, H. B. S. Eur. . . 1822 
iberlcH . . . Yellow . 6, H. B. Iberia . . 1823 
lafisillqua . . Yellow . 5, H. B. Persia . .1821 
liltoraUs . . . Yellow . 6, H. B. Tauria . .1823 
lusitanica . . . Yellow . 6, H. A. Portugal . 1739 
m8e6ilca, 1 . . Yellow . 5, H. B. Azof . . 1828 
oblongata, 2. . Yellow . 5, H. B. B.ical . . 1829 
prffitOx . . . Yellow . 7, H. B. Hungary . 1820 
taiirlca . . . Yellow . 5, H. B. Tauria . . 1820 
tinctPrlS . . . Yellow . 7, H. B. England 
banndticd, hehccdrpd, orientdRs. 
Isch.%mDm, Beauvois. From ischo, to stop, and haima, 
blood ; because of its supposed medicinal qualities. 
Linn. 23, Or. l,Nat. Or. Graminex. Uninteresting 
species, of the easiest culture — aristutilm, austrdlS, 
rugOsHm. 
IsertTa, Schreber. Named after P. E. Isert, a German 
surgeon, in the Danish service at Accra. Linn. 6, 
Or. 1, Nat. Or. Cinchonacex. This is described as 
a very showy species, succeeding in sandy loam 
and peat, and increased by cuttings in sand, under 
a glass, in heat. Synonyms : 1. Guettarda coccinea. 
cocciatA . . . Scarlet . 7i S. Ev. S. Guinea . . 1820 
IsIdTum, Acharius. From isos, equal ; because of ths 
small difference that exists between the podetia. 
Linn. 24, Or. 8, Nat. Or. Lichenes. Small species, 
found most plentiful in autumn and winter on 
rocks and trunks of old trees. I. Westringii is 
used in dyeing — coccSdSs, coralltnum, microsticti- 
cUm, phymalOdes, phragmxHm, Westringii. 
IsmelIa, Cassini. Origin of name unknown. Linn. 
19, Or. 2, Nat. Or. Compotitx. This is described 
as an elegant little shrub, from one to two feet 
high, succeeding best in a light sandy soil, and 
increased both by cuttings and seeds. 
maderensXs . . Straw. . 5, F. Ev. S. Madeira . 1834 
IswenE, Herbert. Ismene the daughter of (Edipus 
and Jocasta. Linn. 6, Or. 1, Nat. Or. Amarylli- 
dacex. These species are all beautiful, and worthy 
of extensive cultivation ; for which, see Amaryllis. 

Synonymes: 1. Pancratium Amancaes. 2. P. cala- 
thinum. 
Amancafs, 1 . . Yellow . 6, S. BL P. Peru . . 1804 
sulphurea . . S-dphur . 6, S. BL P. Hybrid . . 1829 
calathinum . . White . . 6, S. BL P. Brazil . . 1800 
Knightn . . . White . . 3. S. BL P. Florida . . 1836 
Macleana . . . White . . 6, S. BL P. Lima . . 1837 
nutans, 2 . . . White . . 6, S. BL P. Brazil . . 1800 
IsNARDiA, Linn. In memory of Antoine Dante 
Isnard, member of the Academy of Sciences. Linn. 
4, Or. 1, Nat. Or. Onagraccx. Mere weeds, 
found in marshy situations — alternifslld, palustris. 
IsocARPHA, R. Brorvn. From isos, equal, and karphe, 
chaff; regularity of the chaff of the receptacle. 
Linn. 19, Or. 1, Nat. Or. Compositx. An uninte- 
resting plant, of common cultivation — oppusitifolid. 
IsocHiLus, R. Brorvn. From isos, equal, and cheilos, 
a lip. Linn. 20, Or. 1, Nat. Or. Orchidacex. The 
flowers produced by these plants are very insig- 
nificant. For culture and propagation, see Stan- 
hopea. 
graminifOlium . . Gm. yel. . 5, S. Epi. Jamaica . . 1823 
linear^ .... Pink . . 4, S. Epi. Martinique . 1791 
livldum .... Livid . . S. Epi. Mexico . . 
prollferum . . . White. . S. Epi. Jamaica . . 1793 
IsoETES, Linn. From isos, equal, and etos, the year ; 
plant the same throughout the year. Linn. 24, Or. 
4, Nat. Or. Lycopodiacex. A curious little aquatic, 
found in some l^es in this country, 
lacustrls . . . Brown . 7, H. Aq. P. Britain . . 
Is5i.£pis, R. Brorvn. From isos, equal, and lepis, a 
scale; alluding to the regularity of the scales. 
Linn. 3, Or. 1, Nat. Or. Cyperacex. Curious spe- 
cies, growing freely in any common soil, and in- 
creased by seeds, suckers, and divisions. Syno- 
nymes: 1. Scirpus ^uitans. 2. S. gracilis. 3. S. 
densus. 
aiistrfilla .... Apetal . . 7. Grass. S. Eur. . . 
complanatA . . . Apetal . . 7, Grass. E. Ind. . . 1823 
flultans, 1 . . . Apetal . . 7. Grass. Britiiin . . 
Holosclisntis . . Apetal . . 7. Grass. England . . 
nodosd, 2 ... Apetal . . 7, Grass. N. Holl. . . 1820 
romSna .... Apetal . . ?• Grass. A'lftria . . 
setacCd .... Apetal . . 7, Grass. Britain . . 
tennissIniS, 3 . . Apetal . . 7, Grass. Nepal . . 1821 
IsoPT.Exts, Lindley. Derived from isos, equal, and 
pleco, to plait ; on account of the upper segment of 
the corolla being e.jual in length to the lip. Linn. 
14, Or. 2, Nat. Or. Scrophulariacex. This is a 
genus of remarkably showy plants when in blossom. 
They grow well in a light rich soil, and may be 
increased either by cuttings under a glass, or by 
seed. Synonymes : 1. Digitalis canariensis. 2. D. 
sceptrum. 
oanarien-sls, 1 . . Yellow . 6, G. Ev. S. Canaries . 1698 
sceptrum, 2 . . Yel. brn. . 7, G. Ev. S. Madeira . 1777 
IsopogOn, R. Brorvn. Derived from isos, equal, and 
pogon, a beard. Linn. 4, Or. 1, Nat. Or. Proteacex. 
A fine genus of evergreen shrubs, invariably from 
New Holland ; for culture, &c., see Protea. Syno- 
nyms: 1. Protea divaricata. 
anemonifdli&s . . Yellow . 7i G. Ev. S. N. Holl. . 1791 
anethifOllus . . Pale . . 4, G. Ev. S. N. Holl. . 1796 
attenuStus . . . Palo . . 4, G. Ev. S. N. Holl. . 1822 
axillaris . . . Pale . . 4, G. Ev. S. N. HolL . 1824 
Baxterl .... Rose . . 4, G- Ev. S. N. HolL . 1831 
ceratophvllus . . Pale . . 5. G. Ev. S. N. Holl. . 1824 
divaricatus, 1 . . Pale . . 5, G. Ev. S. N. Holl. . 1824 
formdsus ... Rose . « 4, G. Ev. S. N. Holl. . 1805 
longifOUQs . . . Yellow • 4, G. Ev. S. N. Holl. . 1823 
Loudoni ... Purple . 6, G. Ev. S. K. G.’s Snd. 1830 
polycSphal&a . . Pale . . 5, G. Ev. S. N. HolL . 1824 
propinquus . . Palo . . 5, G. Ev. S. N. Holl. . 1824 
spatularis . . . Purple . G. Ev. S. 
linearis ... Purple . 9, G. Ev. S. K. G.’s Snd. 1830 
teretifalliis . . . Pale . . 5, G. Ev. S. N. Holl. . 1823 
trilObus .... Pale .. 5, G. Ev. S. N. Holl. . 1803 
Isopv RUM, Linn. From isos, equal, and pyros, wheat ; 
the Greeks gave this name to a plant resembling 
Nigella, the seeds of which have the same taste. 
Linn. 13, Or. 6, Nat. Or. Ranunculacex. Pretty 
plants, succeeding with the simplest cultivation in 
loamy soil, and increased by seeds. 7. thalictroides 
may be also increased by divisions. 
fumarioIdSs . . Wbt. gm. 6, H. A. Siberia . . 1741 
thalictroldai . • "WTit. grn. 4, H. Her. P. ‘ ^759 
