XCYI. LABIATE. 
1189 
Orthosiphon .] 
united in a broad 3- or 4-lobed upper lip, lower lobe entire, flat or slightly 
concave, as long as or (in a species not Australian) longer than the upper lip. 
Stamens 4, declinate, without appendages ; anther-cells confluent. Style clavate 
or capitate at the end, entire or slightly notched. Nuts small, granular-punctate. 
— Perennial herbs. Flowers in false-whorls of 6 or rarely fewer, in long 
interrupted or short and dense racemes, the floral leaves reduced to bracts. 
The genus is chiefly Asiatic. The only Australian species is a widely spread Asiatic one. 
The genus has the calyx and habit of Ocimum, from which it differs in the elongated corolla- 
tube and capitate stigma. — Benth. 
1. O. stamineus (stamens prominent), DC. Prod. xii. 52 ; Benth. FI. Austr. 
v. 76. Cat’s Mustache. A loosely branched perennial of 1 to 3ft., slightly 
hoary-pubescent or nearly glabrous. Leaves petiolate, ovate or ovate-lanceolate, 
often acuminate, 1 to 2in. long, irregularly and coarsely toothed, or rarely 
regularly crenate or almost entire. Flowers white or pale blue, in whorls of 4 to 
G, in loose but rather short terminal racemes, and by their long stamens resemb- 
ling those of a Clerodendron. Pedicels about as long as the flowering calyx, 
which scarcely exceeds H line. Corolla-tube slender 4 to 5 lines long or even 
more, the lips very spreading, shorter than the tube. Stamens filiform, two or 
three times as long as the corolla-tube, with very small anthers. Style still 
longer, the stigmatie end small and clavate. Fruiting-calyx attaining iin.. the 
upper lobe ovate, obtuse and decurrent, the lateral ones nearly as long, acute, 
with short points, the lower ones connate to the middle, and produced into long 
incurved subulate points. 
Hab.: Cape York, M‘Gillii vay, Veitch ; Port Denison and Daintree River, Fitzalan ; Burde- 
kin River, Bowman; Rockingham Bay, Dallachy ; not uncommon in tropical localities. Fre- 
quent in the Indian Archipelago, extending on the Asiatic continent to Assam and Silhtt. 
4. PLECTRANTHUS, Duer. 
(Referring to the corolla being spurred). 
Fruiting-calyx in the Australian species reflexed, the upper tooth broad and 
sometimes decurrent, the 2 lowest long and pointed, the lateral ones shorter, in 
some other species the teeth all nearly equal. Corolla-tube longer than the 
calyx, gibbous or produced into a spur on the upper side; upper lip 3- or 4-lobed, 
lower lip entire, concave, longer than, or rarely rather shorter than the upper 
one. Stamens declinate, free, without any appendage ; anther-cells confluent. 
Style shortly bifid. Nuts smooth or slightly granular. —Herbs, undershrubs, 
or in species not Australian, shrubs. Flowers usually numerous, rarely only 6, 
in false-whorls, often developed into loose opposite cymes forming terminal 
panicles, in the Australian species more compact, forming interrupted racemes, 
the floral leaves reduced to small deciduous bracts. 
Tbe genus is widely spread over tropical and subtropical Asia and Africa. 
Flowers in false-whorls of 6, lower calyx lobes obtuse. Corolla with a long 
spur 1. P. longicornis. 
Flowers in false-whorls of 10 or more. Lower calyx-lobes very obtuse or 
aristate. Corolla not spurred. 
False-whorls loose, of about 10 flowers. Fruiting-calyx 2 to 3 lines long . 2. P. pa.rvifl.onis. 
False-whorls dense, of about 20 flowers. Fruiting-calyx about 1 line long- 3. P. cougestus. 
Flower-whorls dense. Calyx 2 to 3 lines long 4. P. foetidus. 
1. P. longicornis (long-spurred), F. v. M. Fraejm. v. 51 ; Benth. FI. Austr. 
v. 77. A perennial, more or less pubescent or villous, with short rather rigid 
hairs. Leaves usually 2 or 3 pairs near the base of the stem, obovate or oblong, 
obtuse, sinuate or coarsely toothed, especially near the base ; 1^ to 3in. long, 
contracted into a short petiole ; below the lowest pair there are also usually 2 or 
3 pairs of very small nearly sessile orbicular leaves. Flowering stems erect, 
often above 1ft. high, simple or slightly branched, leafless except at the base, 
