Petrophytum caespitosum subsp. acuminatum

(Rydberg) Munz

Aliso 4: 92. 1958.

Conservation concernEndemic
Basionym: Petrophytum acuminatum Rydberg in N. L. Britton et al. , N. Amer. Fl. 22: 253. 1908
Treatment appears in FNA Volume 9. Treatment on page 414. Mentioned on page 411, 413.

Short-shoots compressed into tight rosettes. Leaf-blades 1–1.8 cm, abaxial surface sparsely strigose. Inflorescences compressed panicles, usually appearing racemose, with scattered bracts along peduncle, branches uncommon, 0.5–1 cm. Flowers: petal apex acute to acuminate.


Phenology: Flowering Jun–Sep.
Habitat: Limestone cliffs
Elevation: 1200–2500 m

Discussion

Of conservation concern.

Subspecies acuminatum is known only from the southern Sierra Nevada in Fresno and Tulare counties.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

Richard Lis +
(Rydberg) Munz +
gray +, brown +  and dark-brown +
compound +  and simple +
opposite +  and alternate +
Petrophytum acuminatum +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1(-3)-veined +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
spatulate +
0.2 cm2 mm <br />0.002 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.2cm +  and 0.4cm +
pilose +  and sericeous +
subulate +  and narrowly obtrullate +
3mm +  and 8mm +
0.5cm +  and 1cm +
hirsute +  and pilose +
not +  and aggregated +
1200–2500 m +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
canescent +  and sericeous +
unisexual +  and bisexual +
2 cm20 mm <br />0.02 m <br /> (?) +
pilose +, glabrate +  and glabrous +
lanceoloid +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
coriaceous +
not +  and aggregated +
not +  and aggregated +
Limestone cliffs +
1 cm10 mm <br />0.01 m <br /> (?) +
crassinucellate +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
compound +  and simple +
marcescent +
persistent +
entire +  and crenulate +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and apical +
3 +  and 2 +
branched to compact +  and branched +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1cm +  and 15cm +
compressed +
0.5 cm5 mm <br />0.005 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0 (?) +  and 4 (?) +
persistent +
free +  and distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flowering Jun–Sep. +
adnate +, free +, connate +  and distinct +
not arillate +
list;count +
persistent +
free +  and distinct +
ovatelanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
1.5-2(-2.5) times petals +
branched +  and simple +
intertwined +
coalesced +
decumbent +  and prostrate +
ascending +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +  and deciduous +
distinct +
basal +, lateral +, subterminal +  and terminal +
not elongate +
sericeous +, pilose +, canescent +, strigose +  and glabrate +
Eriogynia caespitosa +  and Luetkea caespitosa +
Petrophytum caespitosum subsp. acuminatum +
Petrophytum caespitosum +
subspecies +
inconspicuous +
thickened +  and minute +