0phioglo8sum] mi mi- (Carruthers). 279 
o. hjuaitanictwm Linn, v&r. gracillimum A. Br. in Knlm. Til. Ah. 
p. 177 i 1868). 
I'i sgo Andongo. In bare pastures on ili<- rooky l>ank> of the 
rivers Dear Catete ; in fr. .Ian. an. I Feb 1867. No*. 36". 36'. 
2. 0. luso-africanum Welw. in Prantl in ESicbler Jahrb. iii 
p. 312 (1884) 
Pi ngo Andongo. In pastures on gneissose rocks of the presidium 
3500 ft. : middle of -Ian. 1857. No. 34. 
.'.. 0. Gomezianum Welw. in Kuhn, Kil. Air. \>. 17ti (18G8). 
Pungo Andongo. -In liar.- pastures mar the rivers, aloi 
0. rubellum Welw., Dear Catete; -Ian ami Feb. 1857. Nc 35. In 
wet pastures, inundated in Bummer, on sandy mud with Xyrids, 
Antrolepids, Eriocaulons, and sedges, high up on Morro de Lopollo 
towards Empalanca ; in fr. April I860. No. 161. 
4. 0. ellipticum Welw. ms. 
0. Gotnezicmwm Welw. var. latifoliv/m Prantl in Eichler 
Jahrb. iii. p. 316. 
Rhizome cylindrical; Leaves ovate, obtuse or bluntly acute, 
opaque j median nerve not pronounced, disappearing two-thirds 
along i In- lamina ; areolae of I be cenl re elongated, beyond as broad 
a- Long : sporangia •"> to > s i ach row ; apex short, subacute. 
Pi ngo Andongo. In bare pastures only on soil covering rocks by 
ill.' river Tangue near Catete, along with 0. gramineum Willd., but 
much Less common ; Feb. L857. No. 32. 
5. 0. rubellum Welw. in Kuhn, Kil. Afr. p. 179 (1868). 
Pdngo Lndongo. Frequent in bare pastures near the banks of the 
rivulete near Catete, and near Candumba on the river Cuanza ; -Ian. 
and Feb. L857. Nob. 33.33/-. 
6. 0. fibrosum Schum. Dansk. Selsk. Afh. iv. p. 226 (1829). 
I'i ngo Andongo.— In rocky pastures in the primitivi 
between Quibala and Cabanga ; in fr. 28 Dec. L856. No. 31. In 
similar pastures "i' Sierra de Pedras <lc Guinga to about 4000 ft ; 
.March 1857. No. 31/-. 
7. 0. reticulatum Linn. Sp. PI. p. L063 (1753). 
Pungo Andongo. — In slopes with hare pasture of Pedra de 
s. Antonio in the presidium; in fr. 1> c. L856, -lan. and Feb. L857. . 
No. 28 In bare and bushy pastures of Pedras de Guinga : .Ian. L857. 
No. 29. 
St. Thomas's I-i v.nd.— Nol infrequent and gregarious in inundated 
pastures uear the rivulet banks, scarcely I" or 20 ft. above sea-level, 
and not far from the shore ; m h Deo. I860. No. 30. 
EQUISETACE-E. 
EQUISETUM Linn. Gen. Plant, p. 322 (1737). 
1. Equisetum ramosissimum Desf. Fl. Atlantica ii. p. 398 i L800). 
Var. If.. Burchellii Milde, M »gr Equis. p. L43 (1865) 
A'. Burchelii Vauch. Monogr. Preles, p. 47. t. 10. 
Mossamedes. -Frequent in wet places at the mouth of the river 
Giraul ; in fruit 18 Julj 1859. No. 176. 
