|
|
|
|
|
|
|
4.
Opuntia humifusa
(Rafinesque) Rafinesque, Med. Fl. 2: 247. 1830.
Eastern pricklypear
Cactus humifusus
Rafinesque, Ann. Nat. 1: 15. 1820
Shrubs
, forming clumps or often prostrate, usually only 1 or 2 stem segments tall, to 0.5 m (except in Florida where they may be erect and reach to 2+ m with short trunk), flattened to obovoid, sometimes from tuberlike rootstocks.
Stem segments
not disarticulating, dark or bright shiny green, wrinkling when stressed, circular to broadly oblong to obovate, 5-17.5 × 4-12 cm, fleshy, usually tuberculate, glabrous; areoles 4-6 per diagonal row across midstem segment, oval to circular, 2-4 mm diam., not raised, sometimes somewhat sunken; wool tan to brown.
Spines
often absent or 1-2(-3) per areole, spreading, whitish to brownish, terete, straight, and usually stout, 25-60 mm; occasionally also 1 deflexed spine present.
Glochids
in dense crescent of adaxial edge of areole and in dense tuft overtopping crescent in age, yellow to red-brown, to 4 mm.
Flowers:
inner tepals pale to bright yellow throughout, 20-30 mm diam.; filaments yellow to orange; anthers pale yellow to cream; style and stigma lobes white.
Fruits
greenish, tardily becoming apricot to brownish red, elongate, 30-50 × 12-20 mm, fleshy, tapering at base; pulp green and sour, becoming reddish and sweet under ideal conditions; areoles 10-18.
Seeds
tan, 3.5-4.5 mm diam., thickish; girdle protruding to 1 mm.
Varieties 2 (2 in the flora): United States.
|
|
Following served from University of South Florida |
Top | See original context
|
Following modified from Flora of North America
|
Top | See original
|
|
|
|
|
|
|
4b.
Opuntia
humifusa
(Rafinesque) Rafinesque
var.
ammophila
(Small) L. D. Benson, Cact. Succ. J. (Los Angeles). 48: 39. 1976.
Opuntia ammophila
Small, J. New York Bot. Gard. 20: 29, plate 224. 1919;
O. compressa
(Salisbury) J. F. Macbride var.
ammophila
(Small) L. D. Benson
Shrubs or small trees,
erect, to 2 m, often with short trunk, usually oval in cross section.
Stem segments
firm.
Flowering spring-summer (Feb-Aug). Sand dunes, scrub woodland flats; 0-60 m; Fla.
Opuntia
humifusa
var.
ammophila
is poorly known and needs additional ecologic, taxonomic, and molecular study. The distribution given follows L. D. Benson (1982).
|
|
Following served from var. humifusa, Delaware Wildflowers |
Top | See original context
|
Following modified from Flora of North America
|
Top | See original
|
|
|
|
|
|
|
4a.
Opuntia
humifusa
(Rafinesque) Rafinesque
var.
humifusa
O. austrina
Small;
O. calcicola
Wherry;
O. compressa
var.
austrina
(Small) L. D. Benson;
O
.
humifusa
var.
ammophila
(Small) L. D. Benson;
O. humifusa
var.
austrina
(Small) Dress;
O. impedata
Small ex Britton & Rose;
O. rafinesquei
Engelmann
Shrubs
forming clumps, often prostrate, usually only 1 or 2 stem segments tall, to 0.5 m. Stem segments fleshy, flabby, or firm, cross-wrinkled under stress.
2
n
= 22, 44.
Flowering spring-summer (Feb-Aug). Sandy habitats, openings on dry, sometimes wooded hillsides; 0-1000 m; Ont.; Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Va., W.Va., Wis.
|
|
Following modified from Delaware Wildflowers
|
Top | See original
http://delawarewildflowers.org/plant.php?id=1360 ---> https://delawarewildflowers.org/plant.php?id=1360
&pull 20q v5.145 20180528: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://delawarewildflowers.org/plant.php?id=1360 |
|
Following modified from MissouriPlants.com
|
Top | See original
| &pull 20q v5.145 20180528: Error 404 Not Found http://www.missouriplants.com/Yellowalt/Opuntia_humifusa_page.html |
Updated: 2024-04-24 19:57:51 gmt
| | |
| | |
| | |
