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Mammillaria tetrancistra

Higher Taxonomy
Family: CactaceaeView DescriptionDichotomous Key

Common Name: CACTUS FAMILY
Habit: Perennial herb, shrub, tree, generally fleshy. Stem: cylindric to spheric, or flat; surface smooth, tubercled, or ribbed (grooved); nodal areoles bearing flowers. Leaf: generally 0 or early-deciduous, flat to +- cylindric. Spines: areoles generally with central, radial spines, occasionally with glochids. Flower: generally 1 per areole, bisexual [unisexual], sessile, radial [bilateral]; perianth parts generally many [5], scale-like to petal-like; stamens many; ovary inferior [superior], style 1, stigma lobes generally several [many]. Fruit: dry to fleshy or juicy, indehiscent to variously dehiscent, spiny, scaly, or naked; tubercled or smooth. Seed: generally many, occasionally 0--few.
Genera In Family: +- 125 genera, +- 1800 species: America (especially deserts), Africa; many cultivated, some edible. Note: Spines smaller, fewer (0) in shade forms; yellow spines blacken in age. Introduced species increasingly escape cultivation. Hybridization common in some genera. Taxa of Escobaria in TJM (1993) moved to Coryphantha.
eFlora Treatment Author: Bruce D. Parfitt, except as noted
Scientific Editor: Bruce D. Parfitt, Douglas H. Goldman, Bruce G. Baldwin, Thomas J. Rosatti.
Genus: MammillariaView DescriptionDichotomous Key

Common Name: FISHHOOK CACTUS
Habit: Generally erect (decumbent or prostrate), branched or not, branches 0--9(50). Stem: 5--30 cm, [1.8]3--7.5[20] cm diam, spheric to cylindric [or obconic], firm to soft, not regularly segmented; ribs 0, tubercles prominent, conic to cylindric, not grooved. Spines: [2]14--64(90) per areole, < 2 mm diam, needle-like [to hair-like or bristle-like], glabrous [or plumose], straight or hooked [or curved to crinkly]; central spines 1--4 [0--many] per areole, generally hooked. Flower: lateral, in axils of tubercles, 1--5 [7.5] cm diam; perianth cream to white, pink, purple, or lavender; ovary glabrous, spines 0, scales 0. Fruit: club-shaped or cylindric to ovoid [or barrel-shaped], indehiscent, generally red, spines 0. Seed: 0.8--1.5 mm, generally shiny, generally pitted or raised-netted, black [brown to +- red or +- yellow], occasionally with aril.
Species In Genus: 150 species: North America. Etymology: (Latin: nipple)

Mammillaria tetrancistra Engelm.
NATIVE
Stem: generally 1, 7--25 cm, 3.5--7.5 cm diam, cylindric, soft; tubercle axils bristly. Spines: central spines 3--4 per areole, lowermost 18--25 mm, 1+ hooked, tips dark; radial spines 30--60, in 2--3 superimposed ranks, 6--10(20) mm. Flower: 25 mm, 25--35 mm diam; outer perianth parts long-fringed; inner perianth parts 20--28, pink or rose-purple to lavender. Fruit: 15--32 mm, cylindric in age. Seed: aril corky, tan, >= 1/2 seed length. Chromosomes: 2n=22.
Ecology: Sandy hills, valleys, plains, creosote-bush scrub; Elevation: 130--1400 m. Bioregional Distribution: D; Distribution Outside California: to Utah, Arizona, northern Mexico. Flowering Time: Apr
eFlora Treatment Author: Bruce D. Parfitt
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Citation for this treatment: Bruce D. Parfitt 2016. Mammillaria tetrancistra, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=32702, accessed on April 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 30, 2016.


Mammillaria tetrancistra
click for enlargement
© 2011 Neal Kramer
Mammillaria tetrancistra
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© 2013 Keir Morse
Mammillaria tetrancistra
click for enlargement
© 2013 Keir Morse
Mammillaria tetrancistra
click for enlargement
© 2013 Keir Morse
Mammillaria tetrancistra
click for enlargement
© 2013 Keir Morse
Mammillaria tetrancistra
click for enlargement
© 2013 Keir Morse

More photos of Mammillaria tetrancistra in CalPhotos


Geographic subdivisions for Mammillaria tetrancistra:
D;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.