762 
subulate, shorter than the tube. h.G. Native of the Canary 
Islands. Méntha Canariénsis, Lin. spec. 807. Heliotropium 
Canariénse, &c., Comm. hort. amst. 2. p. 129. t. 65. Flori- 
ferous branches very hispid. Corollas white. Very like the 
preceding, but differs in the hairiness, and the more slender 
calycine teeth. 
Canary-Island Bystropogon. 
Shrub 3 to 4 feet. 
3 B. rrumòsus (L'Her. sert. angl. p. 20. t. 22.) leaves ser- 
rately crenated, clothed with fine tomentum above, and white 
tomentum beneath ; cymes axillary, dense; calycine teeth subu- 
late. 5. G. Native of the Canary Islands. Habit of B. Ca- 
nariénsis. Leaves of B. origanifólius. Floral leaves shorter 
than the cymes. Corollas pale purple. ? 
Plumose Bystropogon. Fl. June, July. Clt. 1779. 
2 to 3 feet. 
4 B. ersa’ntuos (Benth. lab. p. 727.) leaves serrated, green 
above, and glabrous, and hardly tomentose beneath ; cymes pe- 
dunculate, corymbose ; calycine teeth ovate ; corolla more than 
twice as long as the calyx, villous outside. h.G. Native of 
the Island of Juan Fernandez, Graham.—A humble shrub, with 
the habit of B. punctátus; but the leaves are acute and ser- 
rated, and the flowers distinct. Tube of corolla inflated beyond 
the calyx. 
Woolly-flowered Bystropogon. Shrub dwarf. 
5 B. oricanirouivs (L'Her. sert. angl. p. 20.) leaves almost 
quite entire, clothed with white tomentum beneath ; cymes pe- 
dunculate, paniculately racemose; calycine teeth subulate. h. 
G. Native of the Canary Islands. Méntha plumósa, Lin. 
mant. p. 273. Floriferous branches rather tomentose. Supe- 
rior floral leaves much shorter than the flowers. Flowers of B. 
Canariénsis, but the calyxes and pedicels are less hispid. 
Marjoram-leaved Bystropogon. Fl. July, Aug. Clt. 1815. 
Shrub 2 to 8 feet. 
Fl. June, Aug. Clt. 1714. 
Shrub 
Srcr. Il. MiwrHÓsTACHYs (from puvOa, mintha, mint; and 
craxvc, stachys, a spike ; the whorls of flowers are spicate, like 
those of some species of mint.) Benth. lab. p. 325. 
13-nerved, tubular. Whorls densely spicate. This section is 
intermediate between Bystropdgon and Pychnánthemum. 
6 B. srica‘tus (Benth. lab. p. 326.) leaves subserrated, green 
on both surfaces, glabrous; whorls dense, spicate; calycine 
teeth ovate. h.G. Native of Peru, at Parrochuca, Mathews. 
Shrub quite glabrous. Leaves 1 to 14 inch long; floral leaves 
much smaller, clothed with hoary tomentum on both surfaces. 
Whorls 6-10-flowered. Calyx very villous. Corolla hardly 
longer than the calycine teeth. A fifth fertile stamen sometimes 
occurs in this species. 
Spicate-flowered Bystropogon. Shrub. 
7 B. romentoésus (Benth. lab. p. 326.) leaves a little cre- 
nated, green above, and rather hispid, at length glabrous, but 
clothed with tomentose wool beneath ; whorls dense, subspicate ; 
calycine teeth subulate. 5. G. Native of Peru, Ruiz. et Pav. 
Young branches villous. Cauline leaves 1-2 inches long, round- 
ed at the base, obtuse and acute, white or rufescent beneath; 
floral leaves gradually smaller: upper ones hardly exceeding the 
calyxes, and clothed with soft villi on both surfaces.  Corollas 
like those of B. spicata, 
Tomentose Bystropogon. Shrub. 
8 B. canus (Benth. lab. p. 326.) leaves ovate-lanceolate, a 
little toothed, canescent beneath ; lower whorls distinct : 
; 1 upper 
ones subspicate ; calycine teeth subulate. h.G. NS or 
Peru, Ruiz. et Pav. Branches villous, slender. Leaves an 
inch long, acute, cuneately rounded at the base. Flowers 
. smaller than in the preceding. 
LABIATJE. XXXVI. Bystropocon. 
Calyx ` 
XXXVII. PycHNANTHEMUM. 
Hoary Bystropogon. Shrub. 
+ A doubtful species. 
9 B. pexta`rus (Poir. suppl. 1. p. 755.) leaves ovate, hairy, 
serrated ; whorls of flowers hispid. kh.?G. Native of Peru, 
Probably a species of Hyptis. 
Toothed-leaved Bystropogon. Shrub. ? 
Cult. The species of Bystropògon are shrubs of no beauty; 
their culture is that of other common greenhouse plants, and 
they are readily increased by cuttings. 
XXXVII. PYCHNA’NTHEMUM (from zvxvoc, pychnos, 
dense ; and av@eptc, anthemis, a flower; the flowers are dis- 
posed in dense whorls.) Michx. fl. bor. amer. 2. p. 7. Benth. 
lab. p. 326.—Brachystémum, Michx. fl. bor. amer. 2. p. 5.— 
Koéllia, Moench. meth. 407. Tilia, Leavenworth, in Sill. 
journ. sc. vol. 20. p. 343. 
Lin. syst. Didynàmia, Gymnospérmia. Calyx ovate or tubu- 
lar, somewhat 13-nerved ; teeth nearly equal, straight, or the 3 
upper ones are joined at the base into an upper lip; throat 
naked inside. Corolla with the tube equalling the calyx, and 
the limb sub-bilabiate ; the upper lip straight, flat, entire, or 
shortly emarginate; the lower lip flat, trifid: lobes all ovate, 
obtuse. Stamens 4, nearly equal, or the lower ones are rather 
the longest, straight, diverging, exserted, or inclosed ; anthers 
2-celled: cells parallel. Style almost equally bifid at top: 
lobes subulate, stigmatiferous at top. Achenia dry, smooth, or 
minutely dotted.—Perennial, stiff, usually canescent herbs, pani- 
culately corymbose at top. Whorls few, dense, many-flowered, 
propped by bracteas, usually forming a terminal head, sometimes 
one or more disposed along the stem beneath. Corollas white 
or purplish ; the lower lip usually dotted with purple. 
Secr. I. Tv'LLIA (meaning unknown to us.) Benth. lab. p. 
327. Calyx ovate-tubular, somewhat bilabiate, with usually 
subulately awned teeth. Whorls few, ample, often loose; cymes 
much branched, many-flowered. Outer bracteas foliaceous: 
inner ones subulate. Leaves petiolate. 
1 P. 1nca‘num (Michx. fl. bor. amer. 2. p. 7.) leaves on 
short petioles, ovate-oblong, acute, remotely serrated, rounded 
at the base, pubescent, clothed with white tomentum beneath; 
whorls many-flowered, dense, cymose ; bracteas linear, or the 
outer ones are lanceolate ; calycine teeth acute, a little awned, 
nearly equal. 2%. H. Native of North America, in corn- 
fields and among bushes from Canada to Carolina. Origanum 
incánum, Walt. fl. car. p. 165. ?  Clinopódium incànum, Lin. 
spec. p. 822.— Dill. elth. 1. p. 87. t. 74. Plant pubescent. 
Leaves 14 inch long. Corollas whitish, tinged with red. Sta- 
mens exserted, 
Hoary Pychnanthemum. Fl. July, Oct. Clt. 1782. Pl. 13 
to 3 feet. 
2 P. Tv'zrrA (Benth. lab. p. 328.) leaves petiolate, oblong, 
acute, a little serrated, narrowed at the base, pubescent on both 
surfaces, pale beneath ; whorls many-flowered, cymose ; brac- 
teas linear: outer ones oblong, awned; calyx bilabiate: teeth 
acute, a little awned; corolla glabrous inside. %. H. Native 
of Tenessee. Tüllia pychnanthemoides, Leavenworth, 1m Sill. 
amer, Journ. sc. vol. 20. p. 343. t. 5. Plant pubescent. Leaves 
2 inches long. Tube of corolla a little longer than the calyx. 
Stamens exserted. 
Tullia Pychnanthemum. | Pl. 14 foot. 
3 P. Lowrsn (Nutt. acad. nat, sc. phil. 7. p. 100.) leaves 
petiolate, ovate, somewhat serrated, acute, short, glabrous above; 
flowers cymose, propped by many bracteas ; bracteas lanceolate, 
