Teristylus.] 
OKCHiDEiE. (S. Moore.) 
335 
terminal margin entire or toothed ; spur straight, linear, obtuse, about 
i as the long as the labellum. Ovary tapering below, glandular-hairy 
on the ribs. Habenaria citrina, Thouars, Orch. Afr. t. 1(3 ; Bojer , Hort. 
Maur. 309; Rich. Orch. Maur. 21, i t. 3. 
Mauritius, in forests on high mountains towards centre of island, Bojer. Also 
Bourbon. I have seen no specimen. 
2. P. ? purpureus, S. Moore. Tubers oblong, fascicled. Leaves 
few together, linear, acute, 3-4 in. long. I in. broad, loosely imbricate 
at the base of the stem. Stem erect, terete, more than \ in. high, 
clothed with a few scattered scales above the leaves. Spike few- and 
lax-flowered, about 3 in. long ; flowers purple ; bracts ovate-lanceolate, 
less than £ in. in length. Lateral sepals ovate-lanceolate, spreading ; 
upper sepal and petals oblong. Labellum oblong-obovate, cuspidate, 
somewhat longer than the other perianth-segments ; spur clavate, arch- 
ing forwards, about -i- as long as the labellum. Ovary glabrous. 
Habenaria purpurea, Thouars , Orch. Afr. t. 17 ; Lindl. Gen. and Sp. 
Orch. 317 (Habenaria?). 
Mauritius, round Grand-Bassin, Bojer. Also Madagascar. I have seen no 
specimen. 
3. P. latifolius, Lindl. Gen. and Sp. Orch. 297. Tubers twin, ob- 
long. Leaves lanceolate-oblong, about 5 in. long, f in. broad, two or 
three together congested near the bottom of the stem. Stem erect, 
clothed with a few scattered scales above the leaves, bearing a long 
dense-flowered cylindrical spike ; flowers i in. diam. ; bracts lanceo- 
late, acuminate, \ in. long, becoming shorter above. Sepals subequal, 
ovate oblong. Petals a little shorter and narrower. Labellum scarcely 
longer than the other perianth-segments, rotundate, 3-lobed ; lobes 
subequal, oblong, obtuse; spur about ^ in. long. Satyrium latifolium, 
Thouars, Orch. Afr. t. 10. Benthamia latifolia, Rich. Orch. Maur. 43, 
t. 7, f. 2. Habenaria chlorantha, Spreng. Syst. Veg. iii. 691 ; Bojer , 
Hort. Maur. 309. 
Mauritius, Flacq, and Quartier Militaire, Bojer / Bouton ! Also Bourbon. 
4. P. spiralis, S. Moore. Tuber apparently solitary, oblong. 
Leaves 4-5 in. long, i in. broad, linear-lanceolate, 3-5 congested near 
the bottom of the stem. Stem erect, usually about 1 foot high, with 
two or three loose sheaths ; flowers ^ in. diam., somewhat scattered, 
secund ; bracts lanceolate, \ in. (or less) in length. Sepals and petals 
oblong, obtuse, in. long, the lateral sepals adnate to the labellum 
below. Labellum about the same length as the sepals and petals, 
ovate, 3-lobed ; lateral lobes short, oblong, obtuse ; mid-lobe longer, 
tongue-like, fleshy ; spur as in P. latfolius. Satyrium spirale, Thouars , 
Orch. Afr. t. 9. Benthamia spiralis, Rich. Orch. Maur . 44. Spiranthes 
africana, Lindl. fide Spreng. Syst. Veg. iii. 709. 
Mauritius, shoulder of the Pouce, abundant, Ayres ! Nouvelle Decouverte, 
Savanne, etc., Bouton ! Also Bourbon. 
